I'm a a weird mix of HSP and PLS, so not a good benchmark - your mileage WILL vary, heh.
17 years in, I approach each day like this: I commit to doing one big thing, that is the thing I'm definitely going to get done today. It could be a shower, a trip outside the house, having guests, doing a chore, etc. If something is two big it gets two days, one to do it and one to recover from doing it. If I still have any ability left in me after doing my one big thing I'll look for smaller things to do and go with the flow of my body. Some days the weather is great, I woke up on the right side of the bed that morning, and I do TWO big things.
We've gotten a new dog recently, and I've added a long powerchair "run" for her to my day, where we bust around the complex at max speed so she can wear herself out and smell interesting things.
After I've run through my resources I keep my mind alive with strategic video games, practicing my braille reading, reading thoughtful literature, etc. And when I just can't do that anymore.... there's netflix and it's endless stream of TV shows I've never seen.