I keep a notebook for my Book Of Me. I put questions I may find online or think about in this. I put one question per page and answer them when I have time. Then as I work on my Book of Me, I have journaling already done. All I have to do is type it out.
I also put layout ideas in this notebook. And I write notes to myself about the pages. Maybe a photo I think would be good with that question or some memoribilia I have that would go with it.