Best tips....hrm, well we had a laserquest in our delivery area, and we did all the pizza for them. As a result there were some rather huge tips there. I think the biggest I got was around $40 for a really big order.

Other than that, I just liked the hot chicks who would answer the door naked or mostly naked.

Edit: There was this guy that drank a lot at one of the apartment complexes....he'd always order really late at night when he was really wasted. He would get a stack of cash out, and pass out on his couch. You'd have to really beat the shit out of his door to wake him up, but once he did, he was always so wasted that he would just hand you a wad of cash and close the door. I never stayed to count it, because it was always obviously waaaaaay more than the order. You'd usually walk away with a $10 tip or more from him for a small pizza.

I actually sorta miss that job. Delivering pizza was one of the better/funner jobs I've had in my life.