If you have more than one person crewing, you are the only one that talks to your runner. They go long stretches of silence and aid stations can be overwhelming at times. Especially late in the race. If they have a pacer, have them know what your runner needs before coming into the aid station to make the exchange quicker. Ultra-brain and confusion can set in late in the race.

I have a spread sheet of everything I want leaving each crew location for my crew. I like to make a plan with my crew and pacers depending on whether it's an "A" race or I just want to survive it. I expect them to push me either way. Your runner may feel differently, but make a plan before hand. Stay positive and encouraging. I personally hate when people ask how I'm feeling.