At least you're still maintaining.. no problem with taking it easy for a while just make sure the pounds don't sneak back on.
The reward for me when I run is just the way I feel afterwards. If I don't run and I'm not eating that well I'll start getting this feeling like I'm dirty, and as soon as I run I feel a hundred times better.
Maybe you could try setting up a sort of reward each week though. If you do your workouts then you can allow yourself a cheat meal on the weekend, or allow yourself to have something that you normally wouldn't (in moderation of course!).
Good luck!