Well, it's already looking like we're going to have a contest, so start getting your submissions ready! The contest will begin on the 1st of next month and will run until the 30th (we'll call that Judgement Day.) The top three will be picked from that and a poll will be put up on the 1st of July for the whole site to chose the best. Any submissions posted after the 28th of next month will not be considered, so start making them now!
While you're at it, the monthly contest only has three submissions at the moment and it wouldn't be too hard to swoop in and steal the month's win.