It's all based on three major things. The looks, the personality, and the attitude.
Imagine this: You see a guy walk into the club. He's gorgeous, a killer smile, dressed nicely. He almost looked like Orlando Bloom. And then he hits the dance floor. Terrible dancer. The women come up to him and asks him for a dance. "Sorry ladies, but none of you can keep up with me. Hit me up later, and maybe I'll take you back to my place." Disgusted, the women walk away. To attract women, you need to shape up these three parts of your life.
Appearance
First thing's first: WORK OUT. Lose that extra baggage you carry around. Ladies like guys who are fit and in shape. I'm not saying to hit the gym everyday to get body builder buff. Just tone your muscles and try and get those abs, women would die for killer abs.
Work on your face. Stay cleanly shaved. Get rid of acne. Trim your nose hairs. Work on your teeth, because a killer smile always gets the job done.
Now your outfit. Go all out, and dress to kill. Going to a place where everybody is wearing expensive clothing? Stand out by wearing simple clothes. People will think of you as "the guy who doesn't care", and chicks dig that. But if you go to a place where everyone dresses like a bum, don't hold back. Dress like the richest guy there, people will call you "Classy and well groomed".
Accessorize. Throw in a necklace, some rings, and get yo' stunnah shades on. Wear a Rollex to stand out.
Personality
Your personality is based on one simple thing: YOU. When talking to girls, be yourself. But if you want to get them to like you, you should probably looks some stuff up in the net. Ever heard of Mystery and the art of pick up? On VH1's THE PICK UP ARTIST, AFC's (Average Frustrated Chumps) are the stars, and Mystery, a world renowned pick up artist, has the difficult task of mentoring them and changing them from nerds to ladies men. One useful tactic is the neg; tease them. Be playful and cocky, but don't over-do it. If you're having a hard time opening up sets, use a pick-up line, like: Excuse me, can I have your opinion on something. Me and my friend just can't seem to stop arguing about this, and we need a female perspective. Is it okay to cheat on your girlfriend?" Follow it up with an innocent smile, and just make stuff up along the way.
Attitude
Everyone's got one. Good ones, bad ones. The good guy. The sweet girl. The rebel. If you want chicks to dig you, get to know them first. Start a conversation and keep talking. Then, get into the topic. "So, what kind of guys are you into?" If she likes the bad biker boys, get into that attitude. If she likes sweet romantics, act like one. I mean, I told you to cat like yourself. But if you're desperate, learn this skill, it'll help you boost your confidence.