Try the GROW model. It’s simple and it works.

If you find the information in the above video to be of interest, Bob Griffiths has developed web-based tool (CoachMaster) that helps structure a coaching session around the GROW framework. It looks very promising as a supplement to telephone coaching which is probably the most common form of coaching these days.  It seems to enable a level of critical thinking and record keeping that could really help us as project leaders with globally distributed teams, or as coaches with globally distributed clients.   https://coachmaster.co.uk/Coachmaster.html