Karen, I'm a list person, too! I don't consider myself the super-organized sort, but I defintely have super-organization on some things (much less on others). Beyond the typical grocery lists, etc, I like to clean my house by going into each room, creating a list of everything in that room that needs done, proceeding to the next room and doing the same, and continuing in that fashion until I have a whole-house list of everything that needs cleaned. Then I get to cleaning. When I learn new things, I find I do great at lists (atleast for short-term memory). A couple of my friends in high school couldn't understand how I could take a whole list of Spanish words and memorize them 5 minutes before a quiz. It didn't work great for long-term memory, I don't think, but lists definitely help me learn. I think it's a vestige of when I had really sharp visual memory and could remember exactly where on a page in a textbook the answer to a question was, etc... (I'm not really like that anymore, though.)
But I digress...
