Discipline and Unity

I've just about finished up Jim Collins' Good To Great audio book, and I've recently finished Dynamics of Software Development by Jim McCarthy. After reading/listening to both, I've come to the conclusion that:

1. For a software team to become successful, you need a common understanding of the goal. Every member needs to know what the final desired outcome is.
2. Every team member also needs discipline. Jason Alexander sums it up better than I could.

With discipline and a clear goal, everyone focuses on the outcome with all the effort they can muster.

Now, there are obviously more factors that contribute to a successful team, but I feel like these are some of the most important ones. If your team has these qualities, you're definitely on the right track.