Go talk to people. Figure out what their pain points are -- chances are, there are other people like them, and if it's enough of a pain, they'll pay for it.

That being said, people are acutely aware of what pains them. They are not, in general, able to come up with what they want (in terms of a solution). That's your job.

So ask people what their pain points are; don't ask people what they want.