Lead by example - like by being positive, solution driven (no problems just solutions)
Expect personal changes - shit does happen
Not every player will be available for every gig (as folks age)
..... all things said that I agree to.
most importantly for me at least - learned from Weir on the Dead's longevity - have a good sense of humour. Laughter ignites smiles which just makes everything that much more fun.
Smile on stage...that's something that can't be taught but makes a big difference to bandmates and the audience.
People pick up on body language, and I find with music and musicians - its like a team sport without a lot of talking, but you can still communicate.
Look to learn from everyone around you. The guys/ gals you least expect to have something important to say can always surprise you with new and important knowledge.
Music is a gift - treat it like one. It will be good to you. Appreciate it and treat it well. It might not be there tomorrow for you.