I carry a small 10 inch strip of Velcro (two-sided) to use for emergency strapping of things. It can be used to hold a brake lever in or to strap the front wheel to the down tube so the bike doesn't roll of the wheel turn. There used to be a device called (I believe) the Flickstand that would do the same thing with the front wheel. Don't know if it's even made any longer. But the Velcro works well.