Knowing what you're talking about! ;-)

Believing in yourself. Or at least looking like you believe in yourself. People will respond positively.

"Fake it til you got it" well that is my moto. seemed to work too. lol

Self talk. The words you say to yourself everyday in your head. When things don't go well say good things about yourself and have a positive vision on how things can be better. As well as using guided imagery, athletes use this technique all the time. Visualize a positive outcome, over and over again and then don't beat yourself up if you miss what you tried to do. Start fresh and use the same technique and you will build both self esteem and better results.

Knowing yourself, your capacities and limitations, where you fit in the grand scheme, overcoming laziness, trusting in yourself, controlling your own mind.

i know it, and you don't. maybe i'll tell you tomorrow.

I believe I'm confident in myself, but I won't get into arguments with people who piss me off simply because I don't want to give them the time of day. I prefer to just walk away, and some people wouldn't call that especially confident. Also, I'm nervous as hell if I have to speak in front of a group of people, or have to present something. Though, once I get up there, my body seems to take charge without my conscious decision and I just... make my audience laugh and enjoy themselves, which gives me more confidence and my shaking stops and I more or less do great. I'm one of those people who makes fun of themselves, and takes strength from others laughing at them, I don't know... When it comes to dating, I tend to play coyly and flirt and make eyes. Once I get to know them better, I eventually take the initiative and ask them out to coffee or something similar. So, I suppose that's confident. But what gives me that confidence? I suppose being able to laugh at myself, knowing that everyone makes the same stupid mistakes I do, that no one is perfect, that I should just enjoy the moment to the best of my ability. I couldn't pinpoint it exactly, but I'm pretty sure it's something everyone can has to some degree.

being comfortable with yourself

I believe one of the big secrets to having confidence is being perceived as somebody who has confidence. Stand up straight, look people in the eye, don't cross your arms and people will start to treat you differently, and you will develop the confidence just by pretending you already are.

Not letting things get you to the point where you think you can't do it.

Knowing who you are and never sacrificing that in any situation.

Liking yourself.