Add used coffee grounds to your compost, worm bin, or municipal compost service. Coffee is a “green” (nitrogen-rich) material, so add “brown” (carbon-rich) materials for balance. Un-brewed coffee can be composted.
Coffee grounds are granular, slightly acidic, and high in nitrogen. Sprinkle them onto the soil, or work it in. Use only spent coffee grounds. Un-brewed coffee is too acidic and nitrogen rich, and can burn your plants.
Rub coffee grounds on your hands to remove smells like fish, garlic, and onions.
Soak white paper in water and used coffee grounds for an antiqued look.
Use a small amount of freshly ground coffee in marinades as a tenderizer for beef.