I have found that rest needs to be either sleep or just low key activities that keep the mind busy. As mentioned, mindless drawing keeps the brain going just enough to keep racing thoughts at bay. Any manual activities are good, especially because the hands cannot move faster than an injured brain can tolerate.

Trying to rest without an activity to do means the options are limited. Resting in or on a bed creates a risk of tossing and poor neck and head posture. I find that unless I am sleeping, bed is not a good place to be. If I am not sleepy enough to fall asleep, I rest in my recliner. If I fall asleep, I can do it without aggravating my neck.

The old idea that lots of sleep is important has been dispelled. Normal amounts are adequate. What is more important is trying to get good REM sleep.