Work the starting backs and midfield on one team. Have just a couple of objectives to work on and don't try to solve every problem. When working on skill, coach it early in the training session, before the players are fatigued. Speed work is also best done during the early part of a practice. Note that speed work is not conditioning, but the understanding about how to be fast.
Shooting is a skill.
This is one of those skills we often do at the end of practice. Consider working on it early in a training session. A practice the day before or after a game should not be a strength training day, as the players need recovery time. Most experts seem to agree that 48 to 72 hours are needed to fully recover from a strength related workout. Of course, this is related to the base condition and age of your players.