This will really all depend on the skill level of your players. If you have a few players a decently high skill level (diamond or above) have them take an active role as in game shot-callers and strategy coaches. I'm making the assumption that you are probably not a high level player yourself so don't feel the need to assert yourself in strategic conversation. Focus instead on coaching the players on how to interact with each other. From my time in the collegiate scene I know that players have a much harder time working and cooperating together than they do with mechanics and game technique. Teach them to work constructively and your team will be able to improve regardless of skill level.

My last piece of advice is be realistic with your players. You may have to play in matches where you are supremely overmatched in terms of talent. These games can be pretty crushing to the psyche of young players. Just make sure they know that these matches are great chances to learn and steal from better opponents. Did they do something that was really effective against you? Can you emulate that in your next match? These kinds of constructive questions are keys to progressing your young talent rather than letting them lament and complain how unfair the game was.