I like to ask my students to compose a "morning mantra" they'd like to say to themselves every morning to spur themselves on to have a great day. I share mine which goes something like this: "Lookout, world! Here comes a strong intelligent woman who can do anything she puts her mind to." They have to share their own mantra with the class the next day, and every day after that I ask a student to begin class by giving us his/her positive self-talk mantra for the day.