The TARDIS is a space ship from Doctor Who where the inside is a whole lot bigger than the outside (which is shaped like an old British police call box).
Habbyworld, I'd see if you can get "Organizing from the Inside Out" from your local library (so you aren't buying stuff to add to the other stuff). It teaches you a lot about how to organize your space so that you know where things are, while not being too picky on clutter.
Flylady.net is more on keeping things clean and organized if you are the primary home-cleaner. It has a good system of "baby-stepping" your way through things. But it's not for everyone.
When I was little, I remember my mom going through the house for what seemed like a long time with little coloured dots. Turns out she would put the dots on everything that she used over the course of two weeks, and anything that didn't have a dot on it she would seriously consider getting rid of (things like clothes, appliances, even some furniture!)