If you're anything like us, there is at least one cup of coffee between you and the front door every morning. We've been collecting our coffee grounds to help out some of our plants that like acidic soil — but as it turns out, used coffee grounds have even more to offer...As this article from Natural Home points out, coffee grounds can be used for more than just adding nitrogen to your soil. Try it as an exfoliant, for instance, or even as a dish scrubbing tool.
And if you've got more grounds than you can use, think about starting a compost pile or sharing with your neighbors.
Image: Martin Gommel licensed under Creative Commons.