Gary Taubes gave a commencement address last year, that's now available online. It's about the balancing act between searching for the truth, being skeptical and at the same time believing in yourself.
It's how science is done right, but it's more than that. It's also about life, and everything that is important to you, and how to get it right. I liked it a lot:
Schmid College of Science and Technology: The Exquisite Balancing Act for Doing Science Right
