Committing to working with a trainer was the thing that finally worked for me. Since I started that (5 years ago?) I've never had a week with fewer than 2 workouts, and most weeks I hit 5 or more.

During that time my weight's gone up and down, but my bone density is great and my cholesterol profile is really good. And I enjoy having good basic strength.

Of course I managed to work late tonight and sat down to pet kitties and read intrawebs rather than hitting the treadmill - but maybe I'll get up and do it now that you've made me think about it :)