Myself included, most endurance athletes don't know enough about proper recovery techniques. I am constantly tinkering with what to do on an off day, or how to wind down after a long workout. This common mistake is evidenced by most available training plans; in contrast to the detailed descriptions of each workout, usually the plan simply says "recovery" for an off-day.
Several months ago I had the opportunity to work one-on-one with Bryan Huberty of P.R.OJECT 305, and a certified ChiRunning instructor. While I had already been running with a similar form to what ChiRunning promotes, Bryan helped me to refine some minor issues to increase my efficiency. As part of increased training and working with a triathlon coach, the techniques Bryan provided have helped me achieve greater speeds and distances while staying injury free.
Yesterday, on his blog, Bryan describes (in immense detail) various recovery strategies, including his own protocol as an elite athlete. Check it out.