Agreed. I started walking for an hour+ each day about 7 months ago. I've missed perhaps 15 or 20 days since then for various reasons. This morning, I felt down and didn't want to go walk. I don't even remember the moment when I decided to get up and walk. I just found myself outside and walking, on autopilot so to speak. Having a habit really makes motivation a secondary concern and has helped me overcome the lack of motivation that hits every so often.