Kermit--Let me be your motivation. Everytime you dont want to come in, or everytime you feel like taking it easy, just look over at me at the edge of the mat in my steel brace and think about how you could be in my position.
Other than that, I cant tell you why I stay motivated. All I do all day is think of ways to improve my technique. Ways to set up that submission in ways I've never seen. Then try it while I roll. Drives me crazy all day while I wait for practice.