Sometimes forcing yourself "not to edit" allows you to bring out things which are hard to catch and hide in the nooks and crannies of your mind.

Brain dumping also works the same way. You write whatever you have in your mind, without even correcting spelling errors. It really brings out things you don't know they are there and bothering you or taking space.

You should at least try once. Takes an hour or so.

I also use a similar method for drafting my blog posts if I have the idea, but can't bring out the rest of the text.