Other than the suggestions I've given previously, I can't say that I've the "direct answer."
However, besides doing the daily meditations/exercises....try doing the active exercises before going to bed (even for 10 minutes, say do a few minutes of each Level 1 exercises and then do the closing), and then 10 minutes again when you wake up. If you don't get the full amount of sleep, at the very least--those 10 minutes in the morning will give you a turbo-charge which will help not be so fatigued during the day.
~Z