[otakucode]

Just jacking up caffeine intake isn't the way to go. Add in 200mg of L-Tyrosine for every 100mg of caffeine. Look into compounds in the 'racetam' family which have proven to be effective at improving attention and memory. Be sure to take some choline (Alpha GCP seems good) along with any racetam, especially if you get headaches from the racetams, they can cause your brain to eat up choline. Nootropics is an interesting field, and if you're willing to turn yourself into a lab rat (you are anyway, so I guess its just a choice to be conscious of it), there are certainly better ways to improve functioning. Also, 5 Hour Energy drinks seem to be pretty good. A little bit of caffeine and a big dose of B vitamins.

[matznerd]

Try taking L-Theanine with the caffeine if you're going to take that much because it will help with dependence and adrenal fatigue. And frankly, I would take a much smaller dose, and generally never take more than 300-400 mg per day. I think you need something that works in a different way than coffee, as the parent to my comment says, look into nootropics. Reddit.com/r/nootropics/faq is a good place to start.

[cheald]

L-Theanine also seems to improve the effect of caffeine in me; the caffeine makes me alert, but the theanine with it feels like my focus can't be broken unless I want it to.