1. Be Great At One Thing
Find your niche, if you are the burger guy, be the burger guy. If you are about tacos be the taco guy, make sure you don't lose sight of what made your food truck great.
2. Never Complain
Complaining is the number one way to fail, odds are always against small businesses, complaining about the big companies and restaurants does nothing for you. Head high, and strive to be better than what you were yesterday.