Anonymous wrote:You just have to decided that this is something you want to do and honor that commitment. It's really as simple as that.
+1
You have to treat exercise as a part of your day no different from sleeping and eating. It's easier to do that if you have an exercise you love (mine's running, though I've focused on other sports over the years) and also something indoors for days when it's not safe to go out (too dark/hot/icy). Also easier to maintain if you enjoy something relatively low-maintenance.
Once you do it often enough it becomes so habitual you don't question it. I've been working out six days/week for 22 years. It's just something I do now, though I still love it, too.