Ditto- in addition, be sure to hydrate well in the next few days before the race, and the night before, carbo load very well.
The day of, you'll do a 45- 50 minute warm up just before the race, with your heart rate ranging from 65- 90% heart rate max. When you get to those upper ranges (85- 90%), you'll just be up there for short amounts of time, like 1- 2 minutes with a recovery of 1- 2 minutes. You should be feeling pretty strong during the warm up ride, but if you're feeling yucky, when you get to the starting line, know you'll be racing hard, but making sure you're not overtaxing yourself by pacing well.
Ok, well beyond what you asked, but just added that in to take you right up to the 10 minutes before the start of the race, if you so choose.