To continue my list...
Wait, I don't think I need to. Is 4 enough? Simple, easy to remember, and everyone should be able to understand them. No lying as a plus. So, to list them:
1. Adding please onto a command converts it into a request. This is what I've finally realised, so I can now avoid stupid 'can you get me' or 'will you get me' requests, instead saying 'please get me'.
2. Tactful honesty is preferable to white lies or rudeness. Only use the other two if you absolutely have to.
3. Say thankyou if you feel thanks. If someone asks you if you would likel something and you do, say yes please. If you don't, but might have, say thankyou for asking. If you will never want them to ask you, say so. Something along the lines of 'I don't really like that, so please don't ask me'.
4. If someone is annoying you, notify them. Tactfully.
Anymore needed? I haven't covered rudenss yet, so....
5. Don't insult people. If someone insults you, tell them according to skill 4. If they keep bugging you, just leave them and simply ignore them.