Hmmm. I'd say that the most important server trait would be caring about the diner's experience. So number one...be available. Look at each of your tables a lot to see if you are needed. When somebody asks for a check...get the check, don't do five other t hings first. Tipwise, its the last impression that they get. Don't be over-familiar. Even in a college bar you wouldn't go wrong keeping a respectful distance until you sense the guest's needs. When you are serving the table next to me, don't have your butt in my face. When I ask for the check , do not ask if I want dessert. Either I'm in a hurry to leave or on a diet or have kids I don't want to stuff with sugar. Do not ask. That is not the time to upsell. Write down the damn order. Nobody can keep it all in their head with out frequent screw ups. Five diff steaks at five temps and five sides? Come on, write it down. Your doc and your pharmacist write it down,so should you. Look at the plate before you bring it out. Most normal restaurants do not have a Thomas Keller looking at every plate. If the pasta is not drained enough get it drained and resauced etc etc.