Firespirit,
I have the same problem you do - motivating to just do it. I do enjoy myself most times once I'm doing it, but it's just the getting myself to get off my duff - and, I've been pretty much exhausted when I get home from work (been off the low-carb for awhile now, and my whole system's messed up again).

One thing I've decided to do is whenever I'm alone in the house (so as not to embarass myself if my husband or daughter sees ) is turning on some music I REALLY like and just jamming around, dancing, acting the fool. It's fun, gives me the giggles, and works up a sweat. I try to do this with housework (which I detest) too...blasting the music and making it a game. I like "15-minute pickup", which is basically setting the egg timer and running around like a madwoman to clean up as much as I can within 15 minutes. We do this as a family sometimes, and make it kind of a race.

Just another couple of ideas

Sh'ra