I’m thinking it would be a good idea to pick up a tire plug kit. Not that I’m planning on having a flat tire, but I figure it’s probably a good idea to have one on hand. Does anyone here have recommendations or things to look for/avoid with them?

Short story time: Back when I was single, and living in a complex of town-houses, a friend of mine (who was married, and lived in a different unit) noticed that one of my tires was getting low. Sure enough, we found a nail in the tire.  He pulled out a tire plug kit (reamer, plugs, and tool to insert plugs), and we were able to fix it.  At the time I did have a spare tire, but that tire plug held up for the rest of the life of the tire.  Ever since then, I’ve thought it would be a good idea to have one on hand, instead of having to take the tire in to a shop.