A practice of thanks
Gratitude is not a mood. It is a way of looking.
People wait to feel grateful, as if the feeling were a weather system that might pass over. Then they wonder why it never stays.
A practice is smaller than that. Name one ordinary thing that did not have to be given, and mean it. A warm mug. A working knee. A message from someone who did not need to send it.
Do this when the day is fine, so you still know how when it is not. Gratitude that only appears in good weeks is just relief.
This is not a demand to be cheerful. You can be tired and still tell the truth about what is holding. That telling changes the size of the room you are in.
Write it down if writing helps. Say it out loud if it does not. Homer & Mae is for this kind of looking: unfancy, repeated, enough.