It is always a good rule of thumb to reuse before recycling. If your computer is still in good condition, consider reusing it. If you simply upgraded your old computer and it is still usable, give the computer to someone who will use it. Ask your friends and family if they have a use for the computer, or consider donating it to a charitable organization, such as a church or goodwill.
If part of the computer, such as the hard drive, has stopped working, reuse the parts of the computer that are working. The keyboard, mouse, and monitor are all good candidates for reuse because they are external computer parts and do not require the computer to be dismantled. These computer parts are also usually compatible with a other computers if the installation software and drivers are available. If you are technologically inclined, and understand the safety practices of dismantling a computer, you can also reuse the internal components of a computer by putting them to work in a different computer. For the more creatively minded, you can indulge in crafts using recycled computer parts.
Another way to reuse your old computer parts is to trade in the computer. Trade-In programs offer points or gift certificates in exchange for old computers and other technology. Environmentally conscious companies that accept the trade in will reuse the parts that are still in good working order, and recycle parts of the computer that can not be reused.