Habitually not writing that is. It's not that hard and yet I procrastinate. Dorothy Parker once said, "I hate writing. I love having written." I don't really hate it, but there are plenty of times when I'll think, "I should write" instead of "I could write." That's why I love her quote.
After creating something, it always feels amazing. It is so much more rewarding than other habits, like making the bed, or taking my vitamins.
I've even set up this blog in a different way to ease the numerous steps it previously required to publish a post. So I start again today with this reminder and tell myself if not daily, then at least every other day.
It all boils down to choice about what's most important.