I think a lot -- probably no more than most people but with an awareness about my thoughts that allows me to fold them into stories, music, English lessons, and even dinner. Some of these thoughts deserve to written down, and many don't fit into the memoir I'm writing and should be writing right now. I like to remember things.
And real or imagined, blogging creates an audience, somewhere and someone to pour your thoughts over, to preserve ideas for use in future essays, stories, songs, and even dinner. Buen Provecho.