When I play at the casino, I have sort of a ritual that me and my brother do. First of all we order ONE bottle of beer, before we start. I don't get drunk while playing serious poker, but, I find that 1 beer is enough to take the edge off and calm your nerves. Never more than one. Than I switch to Redbull, and will order those well I play.

Seems to work pretty good for me, as I usually cash in the tourneys and I am profitable at their cash games.