You give yourself permission to make mistakes. Too many of us come from a background where making mistakes result in bad grades, being marked as a failure, being held back. But making mistakes is how you learn. When you're no longer getting a grade for how you did as an individual along the way, but rather are "graded" by how well your team delivers final results, then you appreciate that constructive criticism is entirely necessary for getting winning results. Ultimately, by being on winning teams, you promote your own growth.