Try focus groups.
This is where you moderate a discussion with a group of about 5 to 10 participants.
Focus groups can work well if you want to: 1) Get initial reactions to new concepts or ideas 2) Learn about general attitudes, beliefs, motivations, and challenges
Remember that this helps to gain insight into how people think, but not necessarily how they act in real life.
For more information, see usability.gov on focus groups.
Also see our talk-back boards recipe.
This asynchronous research method allows many users to provide feedback in response to a prompt on a board. The results are usually displayed visually.