Collage, crochet/finger knitting, gardening, experimental baking, revive macrame, try sculpture, adult colouring books, word/number/jigsaw puzzles, hook rugs or embroidery, become a meme lord, millinery, furniture restoration, darts, shoot some hoops, dancing… ok some of those are a bit silly. But with the time you’ll have and money you’ll save you can just about take up leatherwork, stained glass window making or anything really.

Edit: photography.