Making some decisions before going to bed helps reduce the time to mental shutdown once you're in bed.

If you go to sleep and know you have tasks the next day, you need to let go of them somehow. One way is to make those decisions now, have a plan or a list of things that will be done tomorrow (even if it's just basic). For instance, look at the calendar and see that you have an 8am appointment the next day. Better to know before going to bed than to realize it as you're halfway asleep and suddenly jolted awake by the memory.