Autumn is a season of tangible change, and it's a good time to take stock of what you have, and what is unused. A good rule of thumb is, if you haven't used it in a year, it should go. Kids outgrow their clothes, and everyone has something at the back of their closet that they don't (and won't) wear. These things can go to a charitable organization. Most will supply you with a donation sheet, which you can itemize for tax purposes, so it's a win-win!
"Have nothing in your house that you do not know to be useful, or believe to be beautiful.” ~ William Morris
Got more than just clothes? No problem. Organizations like Freecycle.org are dedicated to keeping reuseable items out of landfills. Why just throw that perfectly good widget away, when someone in your town might want one? You can also post your wanted items, in case someone may have an item you're looking for.
Cleaning unused items out of your house can be a very satisfying task, if your unwanted stuff goes to a person in need. It's refreshing not to be "weighted down" with extra things you'll never use. Start small, one room at a time. You may find yourself zooming through the house, gathering up unwanted items that will become another man's treasure. Then you have a clean slate, and who doesn't love that?