Get your give on. If you have extra boxes, unused plastic bags, tons of bubble wrap, old shoes etc think about donating them on Freecycle. Turns out someone's trash really is another's treasure!
So what is freecycle? "The Freecycle Network is made up of 4,260 groups with 4,565,000 members across the globe. It's a grassroots and entirely nonprofit movement of people who are giving (and getting) stuff for free in their own towns. It's all about reuse and keeping good stuff out of landfills." Just go to their site, type in your location, and they'll hook you up with a bunch of local people interested in getting or giving.
It works- I listed some boxes and someone came to pick them up! That helped de-clutter my closet, and it was easy and fast.