Interesting however, that there’s no mention of the power of cocoa (chocolate extract) or green tea. I’ve reviewed dozens of studies from Harvard Science as well as internation publications that discuss cocoa in particular. We already know the value of antioxidants in green tea but chocolate seems to be up and coming. I’ve been taking a product called vavalert that combines cocoa and green tea and it’s been working like a miracle.
Theanine can also be combined with caffeine as both of them work in synergy to increase memory, reaction time, mental endurance, and memory. The best part about Theanine is that it free of side effects and is easily available in the form of capsules.  A natural option would be to use a good green tea brand which constitutes of tea grown in the shade, because then Theanine would be abundantly present in it.
Choosing to take smart drugs is not an effective or long term solution. Smart drugs may help you study faster or keep you awake longer, but they are not your best option. Most of the ADHD medications are based on an amphetamine structure and they are not healthy for your heart or your liver. Also, by taking smart drugs, you are putting yourself at considerable risk for addiction to these substances.
It’s basic economics: the price of a good must be greater than cost of producing said good, but only under perfect competition will price = cost. Otherwise, the price is simply whatever maximizes profit for the seller. (Bottled water doesn’t really cost $2 to produce.) This can lead to apparently counter-intuitive consequences involving price discrimination & market segmentation - such as damaged goods which are the premium product which has been deliberately degraded and sold for less (some Intel CPUs, some headphones etc.). The most famous examples were railroads; one notable passage by French engineer-economist Jules Dupuit describes the motivation for the conditions in 1849:

Common issues such as poor sleep during pregnancy and sleep deprivation following the birth can often heighten cravings for stimulants and sugary foods, which may seem like a good option for quick sources of energy, however, these foods can often cause further issues with energy and lead to fatigue and low mood. Eating foods that are high in refined sugar and refined grains such as commercial white bread, pastries, cakes and biscuits, give us an unsustainable source of energy. The brain is a very metabolically active organ; despite it only being 7% of the body’s weight, it can take up to 20% of the body’s metabolic needs (2), meaning that it is very energy hungry. This is why it is important to nourish the brain with foods that are nutrient rich, providing the body the building blocks to produce neurotransmitters, as well as a sustainable source of energy. The best options are fresh, unprocessed foods such as wholegrains (brown bread, brown rice, quinoa, rye and oats), pulses, vegetables, good quality sources of protein (meat, poultry and fish) and healthy fats such as those found in olive oil, coconut oil, avocados and oily fish. 
The price is not as good as multivitamins or melatonin. The studies showing effects generally use pretty high dosages, 1-4g daily. I took 4 capsules a day for roughly 4g of omega acids. The jar of 400 is 100 days’ worth, and costs ~$17, or around 17¢ a day. The general health benefits push me over the edge of favoring its indefinite use, but looking to economize. Usually, small amounts of packaged substances are more expensive than bulk unprocessed, so I looked at fish oil fluid products; and unsurprisingly, liquid is more cost-effective than pills (but like with the powders, straight fish oil isn’t very appetizing) in lieu of membership somewhere or some other price-break. I bought 4 bottles (16 fluid ounces each) for $53.31 total (thanks to coupons & sales), and each bottle lasts around a month and a half for perhaps half a year, or ~$100 for a year’s supply. (As it turned out, the 4 bottles lasted from 4 December 2010 to 17 June 2011, or 195 days.) My next batch lasted 19 August 2011-20 February 2012, and cost $58.27. Since I needed to buy empty 00 capsules (for my lithium experiment) and a book (Stanovich 2010, for SIAI work) from Amazon, I bought 4 more bottles of 16fl oz Nature’s Answer (lemon-lime) at $48.44, which I began using 27 February 2012. So call it ~$70 a year.
A common dose for this combination is 500 milligrams per day of Lion’s Mane, 240 milligrams per day of Ginkgo Biloba, and 100 milligrams twice per day of Bacopa Monnieri. Consider buying each ingredient in bulk to have stock and experiment with. If you are not experiencing positive results after 12 weeks, try adjusting the dosages in small increments. For example, you can start by adjusting Bacopa Monnieri to 150 milligrams twice per day for a couple weeks. Be patient: the end result is worth the trial and error.

When we first created the BrainSmart Ultra™ range of natural smart drugs and brain supplements in 2007, our main aim was to deliver the most effective balanced natural smart nutrition supplements for the brain available. We wanted to formulate a range of brain health supporting supplements that not only delivered on its promise to help encourage an individual’s mental energy, concentration and memory but also one that contained, at its core, the perfect balance of neurological health supporting ingredients.

Research on animals has shown that intermittent fasting — limiting caloric intake at least two days a week — can help improve neural connections in the hippocampus and protect against the accumulation of plaque, a protein prevalent in the brains of people with Alzheimer’s disease. Research has also shown that intermittent fasting helped reduce anxiety in mice.
Many people quickly become overwhelmed by the volume of information and number of products on the market. Because each website claims its product is the best and most effective, it is easy to feel confused and unable to decide. Smart Pill Guide is a resource for reliable information and independent reviews of various supplements for brain enhancement.
Analyzing the results is a little tricky because I was simultaneously running the first magnesium citrate self-experiment, which turned out to cause a quite complex result which looks like a gradually-accumulating overdose negating an initial benefit for net harm, and also toying with LLLT, which turned out to have a strong correlation with benefits. So for the potential small Noopept effect to not be swamped, I need to include those in the analysis. I designed the experiment to try to find the best dose level, so I want to look at an average Noopept effect but also the estimated effect at each dose size in case some are negative (especially in the case of 5-pills/60mg); I included the pilot experiment data as 10mg doses since they were also blind & randomized. Finally, missingness affects analysis: because not every variable is recorded for each date (what was the value of the variable for the blind randomized magnesium citrate before and after I finished that experiment? what value do you assign the Magtein variable before I bought it and after I used it all up?), just running a linear regression may not work exactly as one expects as various days get omitted because part of the data was missing.
Is lifestyle truly important, though? According to Dr. Lisa, "genes load the gun, but lifestyle pulls the trigger." As someone who grew up very aware of my genetic predisposition (diabetes, cardiovascular diseases, breast cancer — you name it and someone in my family has it), I always thought that this weighed heavily on whether or not someone manifests an illness. But, groundbreaking research on epigenetics actually states the contrary. 
Caffeine + L-Theanine: Since caffeine can produce unwanted side effects in high amounts (such as jitteriness and headaches), most people, and especially “slow caffeine oxidizers” find that by adding L-Theanine to a caffeine source such as coffee, any negative side effects of caffeine can be controlled. Caffeine and L-Theanine in combination have been researched and proven to boost concentration, attention, and energy while reducing anxiety. For this stack, use a ratio of four parts L-Theanine to one part caffeine, such as 400 milligrams of L-Theanine along with 100 milligrams of caffeine. You may want to start out with a smaller dose such as 200 milligrams of L-Theanine and 50 milligrams of caffeine and work your way up to find the best dose for you (the average cup of coffee has about 100mg of caffeine).
We all wish success came in a pill form. That was the premise of the hour and half Adderall commercial/ thriller film ‘Limitless’ starring Bradley Cooper. In the film he popped a transparent round pill and instantly his brain power skyrocketed- anything became possible. Most of us wished that pill existed- and now it does. Donepezil is a drug that is used to treat Alzheimers, but it’s effects on normal people make Adderall and Vyvanse look like a cup of coffee.

I started with the 10g of Vitality Enhanced Blend, a sort of tan dust. Used 2 little-spoonfuls (dust tastes a fair bit like green/oolong tea dust) into the tea mug and then some boiling water. A minute of steeping and… bleh. Tastes sort of musty and sour. (I see why people recommended sweetening it with honey.) The effects? While I might’ve been more motivated - I hadn’t had caffeine that day and was a tad under the weather, a feeling which seemed to go away perhaps half an hour after starting - I can’t say I experienced any nausea or very noticeable effects. (At least the flavor is no longer quite so offensive.)
This product is a miracle! I have purchased it TWICE because it is so helpful with my memory and cognition. I bought this product because I needed to strengthen my memory and focus, and I wanted to be awake when I did it! I had just switched to a job that is second shift (2PM-11PM) and it was very difficult to adjust to those hours AND learn all of the new technical systems required for my new job. But after taking this supplement, I noticed a HUGE difference in a few days! I was awake and alert like it was 11AM everyday. But it wasn’t like the jolt you sometimes get from caffeine, more like an alertness after a good night’s sleep. No jitters, no headaches, no stomach upset. Just energy and the feeling of being AWAKE. I am now telling all of my co-workers about it!
Jump up ^ Greely, Henry; Sahakian, Barbara; Harris, John; Kessler, Ronald C.; Gazzaniga, Michael; Campbell, Philip; Farah, Martha J. (December 10, 2008). "Towards responsible use of cognitive-enhancing drugs by the healthy". Nature. Nature Publishing Group. 456 (7223): 702–705. Bibcode:2008Natur.456..702G. doi:10.1038/456702a. ISSN 1476-4687. OCLC 01586310. PMID 19060880. Retrieved March 25, 2014. (Subscription required (help)).