I guess for me, there's no issue in needing to remain motivated, as I don't feel deprived of anything. Sure, it took some effort at first to change my habits and to condition myself to question whether all the indulgences that are thrown at us on an everyday basis will make me any happier in the long run, but now everything just feels like it's on autopilot. I still feel like I do lots of indulgent stuff-- go out to the movies, to dinner, travel, entry fees for races, etc., but I have cut out all the spending which was really wasteful. I *love* my monthly investment day, and get a lot of satisfaction out of seeing my investments grow over time.
What's to motivate? I love what I get out of just living my life.