Repetition will generate habits, habits turn in to rehearsals, rehearsal habits lead to performance habits.
Now, to get them the "reps" on the music w/o playing 100% of the time I use the following.
1. Count rhythms.
2. Say articulations.
3. Push air - (blowing air in the instrument, pressing valves/keys down)
You can get 10-15 reps in this way w/o playing a note.