Cable disc brakes. I kept putting it off but it was riding like shit and didn't feel safe, brake levers nearly contacting the handlebar. I had it in my head that the adjustment was like a 30 minute job. Grabbed Allen wrenches, a couple third hands, screwdrivers. 5 minutes and two Allen bolts later, all done. Topped off the tires with air, quick test ride, meat's back on the menu. No real point to this post, but maybe you've made a quick adjustment or repair that made you happy?