When you're picking up women one of the most important qualities to display is positivity or optimism. Why?
Because it makes you appear; confident, approachable, and sociable. Think about it? For those people that have a frown on their face or are visibly angry, you don't want to spend time around them. They don't attract anyone, let alone the opposite sex!
How do you display optimism?
Smiling - Just by smiling you are happier. And this feeling or energy is recognized by others and especially women. Further when you smile at women you are showing your most attractive side. Think about the last women that looked at you and smiled she was much more attractive then just the pretty girl!
Body Language - This sounds vague so to be specific; keep your head held high, look people directly in their eyes, walk with correct posture … Additionally if you are with friends if you can show affection in a masculine way, then do so. What I mean is if your out having some drinks with your friends say something like "aaaggghh you're my best friend blue" and give him a hug or if your with girl friends or female family member you can wrap your arm around them or whatever. This just makes you seen as more approachable and outgoing by the other women in the room.
When you talk to girls - Talk about good things. For instance, don't complain about your obnoxious friends or how long you have had to wait at the bar. Instead talk about how great of a night it is, how great of a life you have, how great your family is, how much you love video games, or internet porn. Haha, my point is talk only about things you have something nice to say about. This will create the impression with her more that you are nice, outgoing, and sociable.
If you can successfully display these characteristics to women you will have success picking them up! When you aren't successful just remember it is one girl and there is another one right around the corner. Additionally it helps to remind yourself that rejection is the cost you and everyone has to pay in order to meet enough women to really find the right woman. The one that you can spend the rest of your days with and really be happy with. Don't forget there are a lot of bad women so you must meet a few to really find the good ones, but they are out there!