12 Do not assume that everyone likes you, agrees with you or supports you. When you know you're right, even be prepared to be one against one hundred if it becomes necessary.
11 Never reveal all that you know. Your own knowledge can be used against you.
10 Don't trust people if you don't know them well.
9 Even if you know them well, that doesn't mean you can trust them.
8 There is a bottomless pit into which a low person will stoop; never assume that anything is sacred or off-limits when they look to do you harm.
7 ALL of the lyrics to the 1971 hit song "Smiling Faces Sometimes".
6 No one can take anything from you that you don't allow them to take. Fight for what you want to keep, either literally or figuratively, depending on the situation.
5 Being the better person is often the best way to win.
4 Kindergarten is over (well, at least it is for most people older than 5; some still live there for decades after).
3 Always strive to do what your opponent does not expect you to do, especially when he/she initiates. You may be falling into a well-laid trap.
Sometimes we let life guide us, and other times we take life by the horns. But one thing is for sure: no matter how organized we are, or how well we plan, we can always expect the unexpected. ~Brandon Jenner
Not everybody that craps on you is necessarily your enemy and everybody that gets you out of crap is not necessarily your friend and if you're warm and happy, no matter where you are, just keep your big mouth shut!
I've never had any enemies until now.. which is kinda odd to have one at my age! I have learned not to trust, not to believe people always mean well... they don't... It's a hard lesson to learn and I would wish I hadn't had to learn it at all.