Are you taking rest days?? I feel they are very important. My body needs a day to relax. Don't forget your mind does too! Yoga or meditation is a perfect rest day 'workout'. So sit back, read a book, catch a movie, or meditate! Make sure you are still getting in all your water!

http://goodlifezen.com/2008/04/18/how-to-start-meditating-ten-important-tips/