Any suggestions for first day back to work (see details)?

Recouping from a serious health issue and have been on short-term disability (STD). Easily exhausted. Not accustomed to staying awake and active for a full work day since the start of STD.

Obvious answers to me are: get a good night’s sleep (mostly difficult considering I have intermittent insomnia), pace self throughout the day, drink plenty of fluids, eat regular meals, rest as needed, move around as needed, etc.

Anything else I should know? Do?