Many people know that Scott Adams is the author of the popular Dilbert comic strip. Adams has published lots of books of Dilbert, and has also written a few partially humorous non-fiction books. I have been a avid reader of his blog ever since he started it. He's smart, sarcastic, ascerbic, and sometimes has a potty mouth, but he always has interesting things to say.
Here are two recent outstanding posts on public speaking and hypnosis.