I came across some advice from Adrian Bryant on how to get motivated to lose weight that I think you could use for writing.
Ask yourself why you want to write and after you come up with a reason, add “so that…” and answer that question.
Examples:
I want to write SO THAT I can tell my stories… SO THAT I can share with people… SO THAT what happened to me won’t happen to anyone else.
I want to write SO THAT I can make money… SO THAT I can quit my job… SO THAT I can write all the time… SO THAT I can spend more time with my kids.
He thinks that the more times you say “so that” the more you’ll be motivated but it is also a great tool to find the real purpose behind what you do.