Nothing is more frustrating as a runner than feeling fast and in form, only to wind up forced to sit and recover due to an injury. The truth is that, with proper foresight and care for your body, many running injuries can be avoided. This includes training weak muscle groups and improving stability and balance, as well as massaging and even icing sore muscles and proactively concentrating on any hot spots.
If an injury does occur, often the solution is as easy as the famed "RICE" acronym: Rest, Ice, Compression, Elevation. With a little luck, trading a few days or weeks of training for putting one's feet up on the couch with some compression socks and icing the trouble area will return huge dividends when you do return fully healthy.