I second watching the WePay talk. One of the best pieces of advice I heard at Startup bootcamp came from Bill Clerico (WePay CEO) when he described building so

I second watching the WePay talk. One of the best pieces of advice I heard at Startup bootcamp came from Bill Clerico (WePay CEO) when he described building software as a community process. It seemed like an elegant way to say users are what really matter and it applies equally well to commercial, open source and personal projects.