This website has lots of info:
http://www.coachesclipboard.net/Coac...asketball.html
A key to success is running organized practice sessions. You need to include lots of drills that develop fundamentals. Too many coaches just show up and let the kids scrimmage the whole practice.
As far as running set plays, Coach Rupp's old "guard around" still works great in the 21st Century:
http://www.guidetocoachingbasketball.com/play_8.htm