http://money.cnn.com/pf/features/lists/tipping/ "* Mike Lynn, associate professor of consumer behavior at the Cornell Hotel School suggests tipping pizza delivery folk a minimum of $2 per pizza. His reasoning: Food delivery can be dangerous if delivering to crime-ridden neighborhoods or driving in bad weather, etc. The Web site www. tipthepizzaguy.com suggests the following: 15% for normal service, with a $2 minimum; 20% for excellent service; 10% or less for poor service; at least 10% for orders of $50 or more. Don't assume a delivery charge, if there is one, goes to the pizza deliverer. Ask the person who takes your order."