Practices-Teach/Balance/Manage
At Practice, know what you want to teach, know how to teach it, try to balance practice for all players/positions, offense/defense, but be ready to sacrifice that balance when necessary to teach a specific skill or position that needs attention. Practice management consists of just being organized and having a plan and communicating that plan to players and coaches.
Scrimmages/Non-Elimination Games-Balance/Teach/Manage
If you do not put balance first when you have the opportunity in scrimmages/pool play (i.e. play players equally, rotate pitchers/catchers, work other positions, get all kids at bats) you are losing the chance to let players show their ability and progression in skills, hurting team chemistry, and compromising your teams ability to adapt to adversity (i.e. finding who can fill in in case of injury). These are also the best games to be teaching, working on new plays (offensively and defensively). You have to manage these games, but you should be willing to take a chance on losing in order to balance playing time and work on game situations (bunting, squeezing, 1st and 3rd plays, pitcher working on new pitches, etc...)
Elimination Games-Manage/Teach/Balance
Coaches primary concern here is to win and get to the next game. There is still time to teach but the priority is on managing the game in the way that gives the team the best opportunity to win that day with minimal regard to balance or teaching. Best 9 bat, best 9 field, best available(not fatigued) pitcher pitches. Pitchers work pitches they have mastery of, you run plays you are confident you can execute.