I have a ritual where, about five beers deep, I grab myself either a coffee (with whisky, of course) or an energy shot. Maybe I'm just getting old admitting that, but, trust me, you'll thank me later for following a similar routine.
When you're outside and filling your stomach with booze and heavy food all day, you'll need an extra kick in the ass to maintain a level of energy that will last until well after midnight—especially if your team wins.