I don't profess these to be the ultimate truth or even assert that they haven't been stated a dozen times over on this site, but the germ of this post manifested itself in my mind this evening and won't relent until I commit it to writing somewhere. These are in no particular order.
1) Disappointment is momentary. Shame is passing. Regret is forever.
It is better to come out of the proverbial battle defeated but secure in the knowledge that you fought it than to sit by a coward and never know the result.
2) "If you can't forgive and forget, then how's this? Forget forgiving and just accept that that's it."
This one comes from a song by the British hip-hop duo Dan le Sac vs. Scroobius Pip. It's pretty self-explanatory. Forgive and forget is a great philosophy to live by, but sometimes you just can't do it. If that's the case, just let it go. Being mad won't change it.
3) There is a time to be cautious...
Think before acting. It's a simple concept that can have terrible consequences when disregarded. Know what you're getting yourself into before you get into it.
4) ...and a time to just do.
Sometimes, you just have to take a tip from those old Nike ads. Just do it.
5) Don't complain about something you have the power to correct.
In the time you'd spend whining about a problem you can control, you could have fixed it 10 times over!
6) A smart man knows what to say. A wise man knows when to say it.
It's nice to be able to solve the problem. Do it with tact.
7) "You stay classy, San Diego."
Keep it classy. Dress well, look sharp, speak eloquently, employ wit.
8) Be smart about being stupid.
If you decide something might not be the best idea in the world to go through with, but you decide to do it anyways, be smart about it. If you shouldn't be doing it, don't get caught. If you could get yourself hurt or killed, tread carefully.
9) Be heard.
Got something important to say? Say it at the appropriate time.
Quotes to consider:
"If not me, who? And if not now, when?" -Mikhail Gorbachev
"You must be the change you wish to see in the world." -Mahatma Gandhi
"Don’t find fault, find a remedy." -Henry Ford