Be honest: Just how many pairs of old athletic shoes are littering the floors of your family's closets? "All you need are the ones you're wearing right now," says Gail Blanke, author of Throw Out Fifty Things, plus any specialty shoes for your kids' sports.
You can be kind to the earth (or others) while you do your shoe-removal blitz. Most shoes (even ratty ones) can be recycled and turned into material used in playgrounds and tracks. Go to recycledrunners.com or letmeplay.com/reuseashoe for Nike's program.
Or donate gently used shoes to soles4souls.org or other charitable organizations.