> how do I know if I'm building something only useful to myself but not a group of people like me? Get true market validation-- can you target and find more in

> how do I know if I'm building something only useful to myself but not a group of people like me? Get true market validation-- can you target and find more individuals (outside your circle of friends) who can give you impartial feedback on components of your product/service? If you find a buyer that's usually a good indicator.