Throughout the country there are companies that conduct surveys and taste tests for large companies looking to change or expand a current product they sell. Getting your name and informaion in their databases is an easy way to make a little extra cash, usually for very little effort. Each company looking for participants has a specific target audience they want to get opinions from, so there are opportunities for people in all stages of life. Do a little research to see if such companies exist in your area (usually in all large metro areas) and enjoy a little extra cash flow! :)
I just did a taste test for Kraft yesterday and in an hour (including driving time) made $30!