Fragrances help in my case. Putting on some nice hand cream for instance. I don't allow myself many treats like that (childhood traumas still tell me I am not worth any of them) but I sometimes allow myself one.

And then: if I can set my mind to it, and my courage, I start cleaning. I find cleaning the fridge very helpful: it's a small compartment, it's all smooth, all shelves are glass, it's pretty once it's all done. Very satisfying.
I also like to, well errrr... clean the toilet. Now don't get me wrong: I clean it daily. But to really use Stuff And So On That Smells Good helps. It's, again, a small space, the tiles are smooth, it's great to do that.
What helps me as well is vacuum and then mop the floor. While doing the laundry. Then hanging out the laundry and it smells so nice, makes me feel good. I usually finish this with a shower (although i can't really afford many of those anymore because of the crisis) but when I can it's a real treat! I am clean in a clean house, jump into a clean bed, oooh... 💖