Marked "drugs" but it is a combination of caffeine and nutrition. For max productivity I need a long stretch with energy and mental calm. Over or under eating c

Marked "drugs" but it is a combination of caffeine and nutrition. For max productivity I need a long stretch with energy and mental calm. Over or under eating creates drowsiness or distracting hunger. Over or under caffeinating is also a problem. The real reason I quit smoking was because I couldn't work for more than four straight hours without the cravings starting to affect my focus. EDIT: workplace organization and sleep have been problems in the past but not now, thanks to melatonin and a private office.