One of the stones we're constantly pushing uphill in our house is clutter. Mail comes in the house and clutters up the counter for days until something is finally done with it. Reciepts and little notes I've taken throughout the day end up on my bedside table and are eventually forgotten or thrown away. I'm constantly fighting to add some organization to all this clutter. I'd be willing to bet you are too.
OrganizedHome.com is one of a few websites out there dedicated to helping you clean up your life. One place you might want to start is this personality test. I'm somewhere between a hoarder and a sentimentalist.
(I also recommend reading 43 folders.)