Notice #4 on a guitar gig a couple nights ago. Very true.1) Practice as much as you can
2) Don't TRY to play with feel, just play how YOU feel the song
3) Listen to the whole band as if you're not in it, don't focus too much your own parts
4) Relax your body, especially your spine, move around, even if it's just nodding your head to the beat - if you're standing there stiff as a board, you're going to play stiffly