First and always, have fun. And everyone says how friendly and helpful trail running folk are. Suits me fine.
Second, I plan on starting kinda slow, getting used to the course, and finding my own race pace.
I plan on shortening my stride up the hills, power walking on the steeper ones, and not taking the downhills too fast so as to avoid quad injuries.
If folks want to pass, I'll let 'em. If I need to pass someone, I'll be patient and wait for a wider spot in the trail.
And again, I plan on just plain having fun. If you have any other suggestions on how I can better enjoy my first trail race, I'm very open!