It's frustrating how difficult it is to get into a habit, but how easy it is to get out of it. One little change in routine or schedule and there you go: derailed. For me, this is particularly true of things I do that don't affect anyone else. Writing, exercising, studying. Now that I'm not playing music for church anymore, I find myself going...way to long between sessions at the piano, then I find myself thinking "something is missing", and I eventually sit down and even just playing a few songs feeds that particular music-shaped place in my soul. But when no one is watching or waiting or counting on me to write a chapter of my novel, or put running shoes to pavement, or play a song or three, it's easy to just do something sporadically that I'd ideally like to do much more regularly.