I have my first mass start ride this weekend. It's the El Tour de Phoenix, a 72-mile charity ride. I have been training for it a couple of months now and have had my last 3 long rides be 55 miles, 65 miles, and 80 miles, so I think I am prepared. The problem is, I would like to finish it faster than I finished my long rides. Anyway to increase my speed and not die/injure myself, or is it too late to prepare anything?