If a development team does pair programming, where does testing fit in? You don't have to wait until the programming is done—testers can be part of the whole process, from code design to reviewing changes to production. Pair programming plus a good automation strategy mean quality is built in throughout development.

The Netflix team has to be dynamic in order to move as quickly as the demand of its audience. Because of that, the company only hires senior engineers, avoids actually sticking to process whenever possible, encourages a great deal of employee freedom, and even pushes budgets to the side.

Too often, test-driven development still initially focuses on coding aspects, not testing. The first step in a test-driven approach has to be writing effective tests. It's not enough to simply ensure good coverage; effective tests should also confirm that decisions made in the code work correctly.