I had a great mentor back in the early 1950s: Walt Robertson. I took my first guitar lessons from him, and on a number of occasions we'd sit in a restaurant in Seattle's University District and he'd explained to me his approach to programming sets, concerts, and such.

About eight years ago, for the "Tales of Walt Robertson" thread, I wrote a fairly lengthy piece about some of the things he told me.

For what it's worth, here's the post:   CLICKY

This advice has stood me in good stead for over fifty years.

Don Firth