Competition keeps me motivated. I play basketball with my friends, play golf, practice jiu jitsu, run/sprint. My friends are all pretty hardcore about their workout and diet as well and it keeps me in check.
When my friends get faster, stronger, jump higher, hit the ball further it motivates me to exercise more to keep up and beat them.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.