Alain de Botton is a great speaker. Not only that, but in this video his content is incredibly interesting. While you listen to him speak, think not only about what he says, but how he says it. One great way to become a more effective speaker is to listen to great speakers, pick out what you like, and try using their techniques in your own speaking. Keep an eye out– you’ll be surprised how much you can learn about speaking from people around you.