Tea is a definite for me although coffee will suffice if I am out and about on the cobbles.
As to the booze, well the dream was always to live a Hemingwayesque existence in which I was going to booze, brawl, bonk and generally be as boisterous as possible which would propel me to the literary infamy that was going to be mine for the taking.
Only problem was that whilst on the sauce, I barely wrote a word and whilst my Muse was as bigger fan of Bacchus as I was, sadly we got nothing worthwhile done.
Caffeine is about it for me these days.