Mine is - DO NOT go to the building you work at. Like if you’re a retail worker, it is not wise to go to the store you work at or the restaurant. Because they see you come in shopping for whatever reason, they’ll possibly be on your ass about you being able to come in and shop but not work that day.
Turning off teams messages on my phone.
Making sure to opt out of all meetings during that time so no one expects me.
If my vacation spans multiple days, my only rule for how I should use my free time is to not just sit in front of the TV all day. Do some chores, go to some cool place, work on a personal project, go on a long hike, whatever. Usually I have plans anyways when I take a long vacation.