I found this great article at Redbook Mag online called De-Junk your Life.
Here are some great tips on how and where to donate your clutter so that it may help others.
CLUTTER FOR A CAUSE
Donating to charity is a win-win situation. You'll turn a chore into a feel-good mission -- and get a tax break! While Goodwill, The Salvation Army, and the American Red Cross are great places to donate most items, consider these outside-the-donation-box ways to get rid of space-hoggers.
Donate them to One Warm Coat, which sponsors coat drives around the country. GO TO: onewarmcoat.org
From piccolos to guitars, Operation Happy Note sends secondhand instruments to soldiers deployed overseas. GO TO: operationhappynote.com
Computers with at least a Pentium III Processor can be donated to The On It Foundation, which provides computers and Internet access to low-income families.GO TO: theonitfoundation.org
The International Book Project will ship your old tomes abroad for use in schools, orphanages, and libraries. GO TO: internationalbookproject.org
Old sneakers can go to the Nike-sponsored Reuse-a-Shoe (the used kicks don't have to be Nikes). The rubber is used to create play surfaces for kids around the world.GO TO: letmeplay.com
The National Furniture Bank Association will give your couch to anyone who needs a hand up, including domestic violence victims. GO TO: help1up.org
At Collective Good, you choose the charity, such as The Center for Domestic Violence Prevention, that your donation of a used phone will support.GO TO: collectivegood.com
Got something you don't know what to do with, but you're sure someone would want? Excess Access matches your items with local nonprofit wish lists.GO TO: excessaccess.com