Explore and amass your stock, I’d say. Find a car or two, maybe build some expansions onto your base, raid some labs and bunkers. Maybe if you’re ballsy enough, head into town and… well, go to town. Clear out buildings left and right, and just pretty much loot everything you can get your grubby little hands on. Hell, I’ve gotten bored enough that I’ve stopped just taking every item out of a house, and I’ve started just stripping the houses clean by deconstructing the furniture as well. Can never have too much firewood.
And if you’re starting to get bored with where you are, take a car, drive off into the sunset, and start expanding your operations. Maybe have a couple of little outposts off in some faraway towns, stocked with the nonperishable supplies you’d need if you’re looking to take a ‘vacation’.