1. Subtlety isn't always the best approach.
2. Don't be afraid to use colourful language.
3. Sometimes you have to challenge authority.
4. Modesty is not always the best policy.
5. Stand your ground, no matter how ugly things get.
6. Know your shit.
7. Playground politics can be useful on and off the playground.
8. Fear is a strong motivator.
9. People will pay for convenience.
10. Not every question has an easy answer.
Images courtesy of Universal Pictures.