Exactly, I agree with Misti. If I waited til I was motivated to exercise, I'd never do it.
It's now just something I do. I find for me the keys are:
Planning - schedule your exercise in for the week - I do my planning on Sunday
Variety - I swim, do general gym, run, yoga, pilates and weight train
Accountability - use us here, or a friend, or your local gym, and make people aware of what you are doing so you can be held accountable
Fun factor - I do stuff that I don't find fun (like running - which I do because it burns a lot of calories and I want to like it
) mixed with stuff I love like yoga and swimming
I workout in one form or another every day. Now it's become an important and enjoyable part of my life, and motivation is there, but there are still days when I don't really want to do it, but I just do it anyway and get it over with