One thing I have found to be very useful is to ask my existing userbase of other projects if they want to test something new and give me feedback. In fact this

One thing I have found to be very useful is to ask my existing userbase of other projects if they want to test something new and give me feedback. In fact this worked so well that I am currently building a new project around this. A site that lets startups gather feedback from people who are interested in trying out new sites and giving feedback. It is currently in private beta with about 20 startups. If you want an invite, feel free to send me an email.