1. Don't wave.
2. Introduce yourself.
3. Thank your bartender for each round, but don't tell them to do anything.
4. Know your order.
5. But don't forget to consolidate if you're also ordering for the rest of your group.
6. Start a tab.
It signifies you're in it for the long haul and that your bartender needs to remember your name and your face. It also increases the chance of a round on the house, which isn't a bad way to be remembered at all.