Just come by and give me some water. What really gets me is when you are sitting like two feet from the pitcher and you can't get up and fill your drink. Junior Anna Davis works at the local Steak' n Shake and gives her covert tactics to get better tips. Never, ever be rude, no matter how rude the customer is. Next, always, and I mean always, keep their drinks full.
People love to take advantage of free refills.
You should always make yourself available, but not too available and be pushing yourself on them. But, just being friendly usually gets you good tips. When your cheeks start hurting, that's when you are doing the job. Most said if the same bill was presented at a fancy restaurant and at a lesser one, they would tip more at the nicer restaurant. You feel better in a nicer restaurant, so you just tip more.