Autopilot, habit and relentless shame/self abuse/beating myself up.
It's not full proof, but it does prevent or at least slow down the overall decline. I can handle cooking, eating, sleeping, laundry, grocery shopping, dishes, pets if needed, basic self hygiene and reminding it to others and maybe something else as well which i might be forgetting at the moment.
Clutter and subsequent dusting are the biggest pain points, but in my defense i am managing up to 3 ADHDs(2 diagnosed, 1 suspected). Probably maintenance sex as well.
Though these are the ones that constantly reminde me that I'm not enough and need to do better. Need to try harder.