Absolutely nothing wrong with chilling on the couch on a day off! But also, doing things can be big for self care too, when the things are important. If it helps to frame it that way. I find the important questions are how urgent something actually is, and how much of a relief it might be for future me if the thing is done. If it can actually wait and I’m just being anxious or self deprecating because of bad habits, then I’ll just chill unless I feel up to the task. If doing the task would be self care for my future self, sometimes that framing is just the kind of motivation I needed to get started.