I have this problem. (One of many, ha.) I blog in my head when I'm trying to sleep. I lie awake, trying desperately to fall asleep, and meanwhile my brain is writing, or rather speaking, blog posts. You know how hard it is to fall asleep when your brain just won't shut the heck up?
In bed, these blog posts seem especially witty and/or poignant. They seem important. Unfortunately, I wake up in the morning either totally forgetting what I "blogged" about in the night, or the topic is a lot less witty and/or poignant than it seemed at 11pm last night.
My cure for nighttime blogging? Nighttime writing. Well, not actually writing, but in my head writing. Instead of writing blog posts in my head, I make up scenes. Scenes for books I've already written. Scenes for books I need to revise. Scenes for books I will probably never write. Somehow, even though my brain isn't shutting up, this helps me to wind down and eventually, fall asleep. Of course, I still run into the same problem. The same, "wow, this is awesome, I totally need to write about it tomorrow," and then in the AM, "dang, I can't remember what the heck I thought was so awesome last night," OR, "dang, that actually sucks bricks. I will NEVER write that down."
You know how people keep journals by their beds so they can write down those crazy nighttime inspirations and thoughts? I don't do that because I would never go to sleep. I just need something that attaches right to my brain and records it all. Then with one touch of a button I can either DELETE that junk I "wrote" in the night, or save those gems for real writing time.
Someone get inventing that, okay?