use what works for you and your team and their families or associates
Coaching is A pretty complex service to deliver, depending n the venue and purpose, unless you have people who do all the organizing reliably.
I suspect that coaching would lend itself well to check lists for equipment, permits, schedules, forms, etc. Also, contexts for email and errands would be useful. Maybe you are free not to have to do things like this. If so, lucky you!
I was on a team once with two coaches. One was an IT guy by day and he had all sorts of charts and forms and time-lines that he printed off and distirubuted and it was really helpful. No piece of information was ever left to chance. When we had to meet at a new place, you even knew what door to enter and the names of security guards so we could greet them by name, if there were vending machines, etc. This was before internet. We all knew exactly where, what and when and why. The other guy was good at building rapport and inspiring people, delegating and following up. Everyone loved this team and even our rivals came to our parties because they took place at fun and interesting places and many defected to us! No one was a control freak...the planning and dissemination of information enabled us to do everything more efficiently, so more time could be spent having fun.The IT guy had two boards for us to write questions or comments on, one was stuff that had to be answered that day. At the end of the practice we would gather around and he would answer those. The other was for stuff that could wait. He would type these up with the answer and hand them out at the next practice. Anything written had a date on it and if it was a change it said SUPERCEDES INFO from ____(DATE). GTD didn't exist then as we know it, but I bet he was following the principles.