Hi, and welcome to the forums!
There are a lot of previous threads about this topic already. Doing a search first yields a lot of useful answers.
Anyways, here are some of my tips:
The night before the race:
- Get enough sleep
- Hydrate
- Eat well
Pre-race (morning of the race):
- Warm up. Do about 10-15 min of spinning
- Hydrate
- Don't eat a lot
Race proper:
- Don't go all out on the first few laps. Conserve your energy.
- Keep within 3 to 4 bikes from the front. Use drafting to your advantage.
- Keep an eye out for the possible sprinters, observe when they're making a move.
- The pace is going to pick up in the last lap(s) - try not to get dropped.
- About 300m from the finish, start to open up from the pack to prepare for the sprint.
- Wait for someone to attack first then chase him down.
Many times I've been too early in my attacks, making me lose steam near the end.
Good luck.