I could
IDK
Potentially work up the balls to commit suicide before anyone gets to me? I'm surprised Peeta/Katniss were the first to try, if they really were (doubt it). Anyway, I'd be kind of stuck there since I'd pussy out on the Cornucopia and then I wouldn't be able to do anything because I definitely wouldn't have the determination to do it without a neat sharp tool, although there is an edible plant guide you get access to beforehand, so I could figure out what's toxic and go out messily that way (again, I'd be surprised if no Tribute ever tried that). Maybe I could snuggle up to some sponsor and get sent an excessively concentrated dose of heroin to make it easier but there's no way in hell the Game Masters would let that through.
tl;dr: at least the prior banquets in the capitol were good