Lots of good stuff here already...
I think, fundamentally, dealing with the difficulty in relationships between generations is one of those "REALLY HARD" things FIRST aims for us to work at and overcome. There are no easy solutions in a program that asks you to think and act differently from popular culture on purpose, for a reason.
Respect certainly is a HUGE part of this. I also think learning the personalities, leadership styles, comfort zones, and team roles of others on your team, regardless of age, is crucial.
I too think communication is the key and, as an educator and leader, I do my best to use a "restorative" model that was part of my training in teaching, working with young people, and serving as a conflict resolution facilitator. You can learn a little about "restorative practices" here:
http://www.iirp.org .
Here you can learn about the "social discipline window" which is discussed in terms of justice and other systems, but can apply to any situation where there is an organization with leadership and conflict (ie FIRST teams). For me maintaining control (no, this doesn't mean controlling thought or even decisions, but all leaders need some sense of order) and providing support at the same time is the key, especially in the relationships that span generations.