Are your headphones broken? When you're ready for a new pair, don't toss your old ones; they are recyclable, and they can help you save money on your purchase of a new pair. The company Think Sound (thinksound.com) makes it easy to recycle them. Just visit the company's website and fill out a short recycling form that includes your email address. Send in your headphones, and Think Sound will email you a coupon for 15 percent off your next purchase of any headphones.