Tips for tomorrows 100m Dash?

okay, so i haven't like, done any 'running' for about a year or so, (but i still stay fit...ish..) and tomorrow is my school's intramural, and i'm kinda thinking about joining this time on the track and field event...sooooo... any tips aside from drinking lots of water and a lot of sleep? p.s. i've already some stretching...so that's also off the list