Last break-up I installed a new cabinet, countertop, dishwasher, plumbing, refrigerator, floor, etc. It was fun and by the time I got finished learning, then doing, I'd pretty much gotten over the dude....and I had a nice kitchen to boot. I used some of my new free time for mountain biking and eventually met a guy who likes mountain biking and other things I like too. It's been 12 years of being with a way better match- a lot nicer way to be.
So I vote none of the above: do some things you can be proud of, things you've been meaning to get around to, even volunteer work in something that interests you.