1) Do not spend a lot of time at the expo. Get in, get out. If there’s a speaker you really want to see, get there early enough to get a seat and bring a bottle of water.
2) Have faith in your training and in your race plan. Do not bank time, do not go too fast, especially in the first 5-10 miles.
I don’t believe in luck so I never wish people good luck. You’ve prepared, you have your race plan, now it’s time to execute. Have a good one.