As you start building the product, don't assume that you know all the answers. Listen to the community and adapt. We had a lot of our own ideas about how the service would evolve. Coming from PayPal and eBay, we saw YouTube as a powerful way to add video to auctions, but we didn't see anyone using our product that way, so we didn't add features to support it.
Chad HurleyWhen I started running cross-country and track in high school, literally every race was a failure.
Chad Hurley