[twobyfour]

No coffee. 2 cups of tea per day. No more caffeine than that, and none after lunch, or I won't be able sleep easily or soundly. Caffeine crashes and the exhaustion from caffeine-related sleep deprivation are both so much worse than just not consuming caffeine at all. It's not worth it.

Alcohol: up to two beers at a date, happy hour, or other event. Three if it lasts more than 4 hours. A glass of wine if eating dinner with someone else. Probably averages 2-3 nights per week with any alcohol consumption. No negative effect on social life (though I do enjoy social events more when self-medicating for social anxiety with those beers). More than one drink does affect my sleep that night and energy levels for a couple days, but I haven't been hung over in a decade except for after that one wedding...

[mrits]

I can drink coffee up until I go to bed and have no issues sleeping. However, if I drink more than a few beers I wake up after a couple hours and can't get back to sleep.