^ Agreed.
For me? The Bad Guy Affirmation. "I am bad, and that's good. I will never be good, and that's not bad. There's no one I'd rather be, than me."
And a Vanellope quote: "I'm already a real racer. And I'm gonna win."
Other quotes:
"Fall seven times- get up eight."
"Be happy, it drives people crazy."
"We must embrace pain and burn it as fuel for our journey."
"The reward for confirming is that everyone likes you but yourself."
"Now and then it's good to pause in our pursuit of happiness and just be happy."
Sadly, I don't know the sources for any of these. I just have a lot of quotes saved to my notepad.
I have more funny quotes, though:
"For me, whenever someone shows interest in me romantically I become incredibly nauseated and I have actually thrown up on two people. whoops."-coloradogal, AVEN Forum
^ is by far the best of them.
Edit: Oh wow, how could I forget this? This one is one of my favourite inspirational quotes of all. This is from the cover of the soundtrack of Sonic CD- and combined with the soundtrack
Sonic Boom I think it's especially strong.
"
To live a life of power, you must have faith that what you believe is right, even if others tell you you're wrong.
The first thing you must do to live a life of power is to find courage. You must be ready to reach beyond the boundaries of Time itself.
And to do that, all you need is the will to take that first step--"
http://www.youtube.com/watch?v=mLBLB4zL8XM