I've written books but always fantasy, not what I'm going through (sometimes my characters have depression etc. though). Something that helps motivate me is nanowrimo, which is national november writing month. It's pretty far from November though, so, maybe not so helpful. If you start a blog and decide you want to write x words per week, that can keep you honest as well.
Oh, also, I always get focused on the right starting sentence and then never start. Remember, it won't be perfect at first. You just have to keep going.
Good luck.