How about coffee? I mean, I've already consumed almost four times my habitual half-cup of coffee a week, and that just in the past couple of days.
Then again, the fellow keeping the minutes is not seated next to me, and even if he were he probably wouldn't appreciate coffee (not to mention milk) spilled on his new laptop's keyboard...
I had a Starbucks iced coffee at 7, and that was enough to get me really wired. Caffiene just gives me a headache most of the time, anyway.