[olvo]

That reads a lot like the classic sleep deprived cycle. Hard to get up, tired for most of the day, exhausted after work, feels awake towards the evening, can't sleep, rinse and repeat.

If that is the case I think the key is realizing that you are cheating yourself. When you aren't sleep deprived you should be able to do most of your required work mid-morning and take it easy in the afternoon. Then when you get home you won't be exhausted and can do whatever you want and still go to bed at ease.