Here's Neil Gaiman's commencement address to Philadelphia's University of the Arts, who awarded him an honorary doctorate. It's a wonderful talk on being an artist and pursuing a career in the arts.
I'm getting an honorary doctorate in Computer Science from the Open University next month, and I've been boiling my brain to come up with my own speech -- this has really raised the bar.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.