An exercise: Set a 5 minute timer, and list the things you want to do when you feel tired and low-energy. Then, set another 5 minute timer, and list the things you feel rejuvenated after having done - the things you like doing when low-energy.
If you’re anything like me, these lists are basically disjoint!
Most situations in my life have a default response, and that takes no effort to follow. To deviate from the default response, I need to spend a scarce resource - willpower. Being tired is essentially being low on willpower, and the problem is that my default actions when low willpower do not regenerate willpower.