The key to coaching is to promote critical thinking. I use two types of coaching to do this: top-down and bottom-up.
This involves a manager or a higher up providing feedback to a rep, like listening to a call (or a snippet!) and leaving a coaching comment. It doesn't take a huge amount of time, but it moves the coaching needle forward.
This is a more reflective process for reps. I have my team members provide feedback about one of their calls before I leave my own comments. I then schedule a follow-up call with that team member to review the call in depth, together.
If you're an individual contributor, take charge of your own development by tagging your manager on calls with questions. What did I do well here? Where are my opportunities for improvement? Don't forget to provide your own feedback to those questions as a first step!
If you're a manager, when you get tagged on a call, prioritize it and remember that it's a golden opportunity to develop your team and achieve your talent development goals.