My wife gave me an article on ways simple ways to combat fatigue at home. See it here. Simple things to do that can help with energy levels. The ladies over at the Women's blog beat me to the post.
I have to say that it has been very intellecutally stimluating attending this conference. I have been eating very well/carefully and exercising but I can't seem to get past the after lunch malaise. Good thing I brought some E with me. It has been a life saver! What experiences have you had with E? Post them in the comments section.