well for me training is a big part of my managing game.
as i tend to be as realistic as possible and not make many signings. i like to make sure to get the best out of the players i got and try to raise youngsters.
But i never raise up too many youngsters as i don't tend to play the game for so long.
But to be able to make youngsters reach a good potential and your current players to reach a slightly higher level you will need a good training setup. and good coaches.
Often i go after to fix good staff and training when i start a new game.
I dont make a new training schedule, i usually have a basic schedule which i use. but having 4+ stars in training coaches is always good.
Here is a basic schedule i made for first team: basic_3765.rar
i suggest that if your squad finds the schedule a bit too tough or getting too much injuries then overall lower the workload by 1-2 clicks.
but players can train more and better with good coaches and "light workload" on the coaches setup.