At every turn, service people are constantly looking for ways to "lighten your load". From your hairdresser to your waitress; from your taxi driver to your pizza delivery boy; from your gas station attendant to your hotel bellhop. All of these imprecise service charges, or tips, can really add up. There is actually significant disagreement about how much to tip, for even common services. has done tons of research, and breaks tipping rates down into easytoread categories: food services, hotel services, and personal services, to name a few. Follow these top tipping tips: