1. I try to listen and understand input from others, without thinking of opposing arguments while still receiving the input. I don't assume I know it all, or even much of it. I learn stuff from guys much more experienced than myself as well a "dumb kids who couldn't know nuffin."
2. I don't get all unmotivated when I have to play a song that isn't one of my favorites... Because it is SOMEBODIES favorite, and somebody is digging it, and my playing it with enthusiasm (even if it is somewhat manufactured enthusiasm) will increase their enjoyment of the song, the evening, the venue, the band...
3. Practice often, even when initially unmotivated to start (motivation almost always picks up a bit). I practice "other people's favorites". I have my part ready when the band meets for rehearsal.