1. Move the team forward. If you're sitting on your ass or standing around blankly you're doing something wrong. Figure out what will keep the team and yourself moving forward, even if a very small amount, and do it. Multiple one to ten minute slow-downs add up to hours and days very rapidly when on a long climb or trip.
2. See and accept the situation as it is. Improve it. If it's really bad think of Shackleton. See, not so bad.
3. You can complain, but it's gotta be funny or it's just whining.
I remember reading a story years ago about a friend, Barry Blanchard, suffering on a climbing trip where he wasn't up to the climbing standard. He cooked more, dug more caves, stacked ropes, did whatever he possibly could to move the group forward. That story stuck in my mind as a standard to try and follow--Barry is normally one of the best alpine climbers going, but on that trip he wasn't. He was still a very valuable part of the team. My best climbing and adventure partnerships have all broadly followed the three "rules" above. A fourth rule is that sometimes you can't live up to the first three; try and do better when you can.