Duct tape is good for everything
I got a flat tire on my way to work a couple days ago. These are less common now that I got tires lined with Kevlar, but I still get them sometimes. I started to use duct tape to fix the flats. It works as well as the patches, better because it is so easy to use. You can put a fairly big square of the stuff over the hole and it holds at least as well as the patches. I guess duct tape really is good for everything.
The picture up top shows where I got the flat.