I make it point to talk to him asap. Get his name, shake hands, thank him in advance, give him my name and the names of the rest of the band printed out on the stage layout / input sheet, and ask him is there is anything else he needs to know. I then tell him the band sort of sounds like xxxx, to give him an idea of how to mix and EQ the band. We set up, make sure the amps are working, then we do not play a note until he says to. And we all play something simple when called upon - for bass, I play low E quarter notes for a few seconds then 7th fret D, then a simple bass riff from one of the songs, and I watch him for when he wants me to stop. At the end of the show, I find out what he drinks and bring him one, and thank him again for his work. If he did a great job, I slip him a $10 bill. Believe me, when you come back, he will remember you for sure...