Focus groups are a great way to earn money in person or online. You earn more for your time than surveys, however, they are harder to get into and they usually limit your participation to once every 6 months. They also require more time during the length of your focus group than a regular survey, averaging 30-90 minutes.
One of my favorite sites is 20/20 research. They are reputable and pay well. They have in-person focus groups in Nashville, Miami and Charlotte, as well as online focus groups available to everyone.
20/20 Research - https://www.2020panel.com/
