First date with a guy I'm crushing on... Tips?

The guy is almost 20 and I'm 19. He breeds snakes and is adorably geeky. He is super cute and has a plan for the future. I've been crushing on him for 2-3 weeks now and we're meeting for the first time tomorrow at The Ex (Toronto carnival festival thing). I haven't really had good first dates recently and I REALLY do not want to mess this up.. so besides the whole "be yourself" stuff what kind of advice can you lay on me?