I drink caffeine and green tea, take my omega 3 and my daily multivitamin, i sometimes take supplements like l-carnitine and creatine which have been proven to help in the thinking department, i eat curcumin and black pepper which have, supposedly, a neurogenesis effect... my brain is indeed clearer then it was some years ago, after damaging it with huge amounts of alcohol i think my brain deserves as much fuel as he can get!