If you always put limits on everything you do, physical or anything else, it will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you must go beyond them. - Bruce Lee
I'd also recommend reading Why We Get Fat by Gary Taubes and Wheat Belly by William Davis, M.D. These are not Paleo books but give a lot of research and advice that correspond with the Paleo lifestyle.