I have a list of letters I need to write.
Like the kind you fold up and put in an envelope (other acceptable variations: the kind you fold up and put in a Christmas card and then put in an envelope, the kind you type into a text box interface thingy and click send).
Then there are the single little shapes that, if you clump them together, make words. And if you clump enough of the words together, you get whole ideas. And if those letters, words, and ideas proliferate so that you can clump, arrange, and tweak them a bit, you end up with things like a research paper, a teachable unit plan, an eight-page paper about what I learned from doing a project, a revised short story, and if you're lucky, a decent blog entry.
Oh, how lucky.