Gretchen Rubin at the Happiness Project has a great quiz/commentary on the subject of clutter, packrat tendencies, etc. I definitely learned a lot from her article - both about myself and about ways to declutter my house. Click over and take the quiz.
In addition to her comments and topic areas, I find that lack of good storage space is often a big factor in whether my "stuff" becomes clutter or not. If I don't have a place to put something, or if that place is inconvenient to get to, then that increases the likelihood that I'll create more clutter.
One of the "project candidates" I'm considering for this summer is to pick some key problem areas in my house and figure out how to resolve the "inadequate storage" problems they present. Of course, there is also an element of procrastination here, as well. I've bought a couple of storage racks to hang from my garage ceiling, but have been putting off installing them, and I have a couple of cabinets I still need to assemble for additional storage. The Projects portion of my list is something I've skipped in my last 3 weekly reviews - time to get back on the wagon, I suppose.
What about you - any major epiphanies for dealing with clutter?