Set aside a some of the paint for future touch-ups; store paint in an air-tight container in a cool, dry place.
Ask neighbors, friends and family if they have a need for the paint. Giving the paint to others who need it is an excellent way to keep it out of landfills. Or consider participating in a paint swap. (See Related eHows.)
Contact your local hazardous materials resource center to find out about additional paint disposal options. Some counties have paint recycling or disposal programs.
As a last option, if you must dispose of latex or water-based paint, fill a paper bag with sawdust, sand or cat litter. Pour remaining latex into the bag. Wait for the paint to be absorbed by the sawdust, sand or cat litter. Dispose of the paper bag with your household trash.
Do not use the bag disposal method for oil-based paints. Oil-based paints pose potential environmental and public health risks. Contact your county hazardous materials resource center for information about disposing of oil-based paints in your area.