Obviously most of the hints and tips have been covered, but here is what I would suggest
Basically I've got the best staff to make sure that the players are fit etc.
I make sure that all the players do everything bar the kicking, then have Long Scully Pryce Eastmond doing kicking and the other kicking one.
After a game I straight away get all the players to recover etc and then repeat the process. When someone gets injured you need to re-add them to the training regime.
Hope this helps