I started using a new technique during my intervals, but it's more of a visualization or helpful trick than anything:
Not sure who does this (Dave Z?) but I basically look for landmarks like a tree, a mailbox, that stoplight. I tell myself "only just a little bit further, now" on my way to each little marker. And then, I lie to myself over and over again. It keeps my mind off the pain, keeps me aware of my surroundings, and helped me set a new 20 minute mark a couple days ago.