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.
When I was a kid my moms rule was no video games on sick days. When I’m not feeling well and I take a sick day I don’t play games. I may watch movies or otherwise have screen time but I actually feel like not engaging with gaming makes me more restful and helps me get better faster.
That rule was designed to discourage you from faking it.