I’ve read and watched two fantastic commencement speeches.
One is the Steve Jobs commencement speech, given at Stanford University in 2005. You can find the text of the speech on the Stanford website. I’ve attached the YouTube video below here:
Second is a speech that Conan O’Brien gave at a New York City high school in 2006. It’s not as inspirational, but it’s still got a great message for high schoolers. The weblink below has both a (quite poor) video and a transcript of the speech.