I have a similar productive output currently as you described your amped up self to have and i drink 2 (sometimes 3) coffees a day. I get 1-2 hours cardio in 4 times a week and i spend time with my family. I sleep 7-8 hours a night. I take at least 1 day a weekend off completely.

Pills wouldn't help in fact they would make it more difficult. Organisation, ruthless priorization and discipline are the key. The rest is just distractions.