For commuters or any other riders for whom punctures are more of a concern than weight/performance:
Use an old tube (the more patched the better ) as a protective layer over current tube. Cut the inner middle section of the old tube out (i.e. the width of the valve stem), and seat it over your current tube. I'm not sure if this is a good idea on a roadbike tho, I've done it on my mtb.
http://www.bikeforums.net/showthread...ful-or-useless