My Startup Lessons
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"Working with other people to acheive a common goal is impossible when the goal isn’t common anymore."
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For most projects, I think you need a user-experience designer/advocate on the team from day 1... Which, incidentally, is when the best UI guys are looking for jobs-- the idea of coming in and playing design/UX cleanup on an existing app is a helluva lot less fun than being involved from the get-go.