Cool online book by author Dan Zambonini on getting a web app off the ground successfully. As he writes:
You’ll find processes, statistics and resources that you can use for the entire lifecycle of your app, from developing the seed of an idea to post-launch promotion. Rather than getting bogged down with unnecessary detail and opinion disguised as best practice, this book concentrates on the critical points of each topic to ensure a well-rounded app that’s equipped for even the most demanding users.
That’s the key – it’s short and very much to the point. And it’s completely free.