Useful for US readers, this comprehensive alphabetical guide by Real Simple give great recycling tips and appropriate organizations... some of the best ideas:
Crayons: Send them to the National Crayon Recycle Program crazycrayons.com, which melts down crayons and reforms them into new ones.
Crocs: The manufacturer recycles used Crocs into new shoes and donates them to underprivileged families.
iPods: Bring in an old iPod to an Apple store and get 10 percent off a new one. Your out-of-date iPod will be broken down and properly disposed of
Sneakers: Nike’s Reuse-a-Shoe program (nikereuseashoe.com) accepts old sneakers (any brand) and recycles them into courts for various sports so kids have a place to play.
Toothpaste tubes: Even with all that sticky paste inside, you can recycle aluminum tubes (put them with the aluminum cans), but not plastic ones.