.I've never been very good at it. I'm realizing, though, that without it my list of goals will stay just that. Without self-discipline and making myself do things I may not want to do at the moment, my dreams will remain dreams.
This applies to everything in my life, not just my writing. I've started exercising every day, whether I want to or not. (If I waited until I wanted to exercise, well...) I'm finding that once I get started, I kind of like it. And once it's over, I feel great about myself and what I just accomplished.
Writing is like that. Sometimes I may want to take a nap with my baby instead of using that precious quiet time to write, but I force myself to stay awake and write anyway. And I always feel great about it when I'm finished.
Self-discipline is still something I struggle with at times. I'm human, after all, but the dreams I dream of the things I want (being published, for one) are well worth the effort.