You might find this book helpful:

How to Cheat at Cleaning by Jeff Bredenberg

You might also consider getting a book on organizing, because you can get some great tips from them. I would love to go in one of those stores that are strictly for organization, with all kinds of plastic boxes to help you, and have enough money to buy whatever I want!

Oh, yeah, and you can do one room a day, to make it easier. You don't have to do everything at once.