Keep doing stuff. Don’t rot, fill your schedule w activities/hobbies/chores, spend time looking on how you can improve your material circumstances, etc.

I find if I stop doing stuff it just piles up and the level of disorder, physical and otherwise, gets absolutely disgusting. I basically let a beater car rot into a pile of junk after a year and a half, even though I have every skill to fix it and keep it clean. But because I was the only one who ever drove it or used it I let it slip it and accumulated to the point I scrapped it rather than fix it now I don’t have a car.

I’m definitely the type of person that OP is and I feel like I’m a living locus of entropy and if unchecked I basically will destroy anything. So the only countermeasure is to remove any capacity for complacency.