1. Take a Week Off Exercise.
2. Eat Whatever You Want for 1 or 2 Days a Week.
3. Train Outside the Gym.
4. Get a Weekly Massage.
5. Bracket All Resistance Training Workouts with a Protein/Carb Meal.

http://www.thatsfit.com/2008/09/04/the-5-ways-to-recover-from-over-training/