My QB name says a lot, "PetTheFabric". When I'm in a slump, going through my stash helps. I'll find a fabric I love, choose fabrics to go with it. Then the designing gets me going.
Another method is being connected to a couple of blogs and favorite stores. Lately, I've been downsizing, making easy patterns for charity quilts. Just saw one on the stitching post, I'd like to try.
I'm motivated by being with other people and that's hard during Covid. A group I belonged to befoe Covid moved to Zoom and I like having something to show and something easy to work on and talk at the same time.
What part of quilting/sewing makes you the happiest. My suggestion is to start there.