If you can't use your leftover paint, donate it to community groups, theater groups, schools, churches and others who can use it. You may even be able to take a tax deduction. Call your community to see if they maintain a paint swap shop or if they'll organize a paint swap with their next household hazardous waste collection event. Recycle your paint. You can also recycle your paint.
Some communities collect paint for recycling.
Recycling can give paint a second chance to be used. You should also think about buying recycled paint to help increase the demand for recycled paint. The next time you need paint, ask your paint dealer about it. Recycled paint can be just as good as new. Most people should be able to save, use up, donate, exchange or recycle leftover paint.