Have you ever had writer's block? Can you look back and analyze the cause and how you solved it?
For example, I've heard of people who have to write something before they're free to write something else.
I talked to one writer who complained of writer's block, and it turned out she'd just exited from a difficult divorce and couldn't think about much else. I suggested she write an essay (not for publication) about her divorce experience, just to get it down and out of the way. End of writer's block! Once she'd written about what preoccupied her, she had "mental room" to think about her fiction.
I think there was great freedom in the idea that she's writing this for herself, and not for publication-- she didn't have to make it interesting to others!