In order to do a really good 10, you'll need a really good warm up and at the very least a drive around the course, noting the start, any turns, a distinct point at the 7 to 8 mile mark and the finish.
I used to like doing time trials and for short events like this I'd spend more time warming up than I would for the event itself. The warm up would be similar to a ramp test - start slow and relaxed and increase the pace every few minutes until I reached threshold (aka race pace) where I'd hold it for about 10 minutes. After that I'd take it easy for a few minutes and then ride above threshold for a couple of minutes. This would really hurt. Rinse and repeat a few times before doing a slight cool down and getting of just to pop in the race wheels, put on the top part of the skinsuit, grab the aero hat and head off to the start with a few minutes to spare.
If you haven't been to an event at the course that you're racing at, make a note of how long it takes to ride from where you're parked at the event HQ to where the start is, noting stuff like traffic lights etc. You'll likely get there a couple of minutes ahead of time - which is just enough to get off the bike and check that there's no pieces of glass/flint/road garbage embedded in the tire. Give them a quick check.
If they're starting riders at 1 minute intervals, start your stopwatch (if possible) when your "minute man" leaves.
Having done a really good warm up you'll be much better prepared for the start. As you said, start slightly slower than full on race effort but only for the first minute or two at the most. With the fact that it's a race and the extra adrenaline etc that feeling of 'slightly lower' than race pace will probably be pretty close to race effort. After the first mile you should already be on 'cruise' mode having settled into the ride. Try and keep the effort high during any turn or the turn around (if it's an out and back course).
The finishing effort. Don't leave it until the last 200 meters for a great looking sprint. That point that I mentioned at the 7 to 8 mile mark is a good place to raise the pace a little if you can. If you're already on the rivet and can't go any faster but will make it too the finish then you're doing well, but most folk always seem to have something left in their legs.
Once you pass the finish, try and get about 5 to 10 minutes of easy riding in. It helps clear the head as well as the legs.
Good luck and have a great ride.