Act like the sexiest version of yourself. You don't have to change who you are to be attractive, but you can play up your more attractive qualities. If you can come off as confident and interesting, she'll automatically start warming up to you and half of the work is already done. Think about it this way:
Carry yourself with confidence. Keep your shoulders straight and your chin high, and don't be afraid to look her in the eyes. You're communicating through your body language that you're strong, brave, and worthy of her attention.
Clean up. Shower, put on deodorant, shave, brush your teeth and wear clean clothes. If you're feeling up to it, you can also do your hair and put on a light spray of cologne. Knowing that you're at your physical best will help you act confident and in-charge.
Know how to treat a lady. Save the dirty jokes and discussions of bodily functions for your guy friends. When you're with the girl you like, be polite. Use good table manners, hold the door open for her, and say please and thank you. Good manners aren't necessarily attractive, but bad manners are definitely unattractive, so play it safe.
Make her feel beautiful. You know that warm, fuzzy feeling you get when you find out that someone thinks you're attractive? That's what you want to create for her. The fact that you think she's pretty is a significant turn-on. Here's how to communicate it without going overboard:
Say "Hey, gorgeous" or "Hello, beautiful" when you greet her. It's simple and short, but direct.
Pay her a compliment. Lower the volume and tone of your voice slightly, and say something like "You look amazing today" or "I love your eyes." If you do this right, she'll instinctively lean closer to hear you.
Smile slightly when you look at her. If she asks what, say you just can't believe how beautiful she is.
Start with slow, gentle touches. You can do these in passing, at the end of a date, while you're watching a movie, whenever — the point is that they don't have to be saved for when you're already making out. They can, however, indicate that you're interested in doing a little more. Here are some areas to focus on:
Whisper in her ear. Ears are an erogenous zone for both sexes, and the light pressure of your breath will probably feel good.
Lightly brush the back of your fingers over the side of her face. Bonus points if you can lock eyes with her at the same time.
Touch the back of her neck. You can gently run your thumb over her hairline if your arm is already around her shoulders, or offer to give her a quick neck rub. Keep your motions slow and light.
If you're holding hands, lightly stroke the inside of her wrist or her palm. A few slow kisses on the inside of the wrist could work, too.
Play with her hair. The scalp is a sensitive area for most people, and the light (repeat: light, not hard) tugging that comes from you playing with her hair will feel nice. Run your fingers through it, twirl it, or stroke it.
If you're feeling bold, try laying a hand on the top of her thigh. (This works best if you're both sitting down.) Let it rest there lightly. If she seems receptive, you can try slowly moving your thumb back and forth over her leg, keeping the rest of your hand where it is.
Give her an amazing kiss. If it's done right, a kiss can be the most effective way of getting a girl's attention. For more detailed instructions, see How to Kiss. Here's a few quick tips:
Keep your lips soft and supple. If they're puckered up like they would be before you kiss you're grandma, you're doing it wrong.
Make your breath appealing. Mints, gum, mouthwash, or a good old-fashioned toothbrush can make all the difference on whether your mouth tastes good or terrible.
Keep the tongue action delicate (at first). The motions should be light, soft and fast. Remember to keep your tongue moving — don't just let it sit in her mouth.
Know where to put your hands. The back of her neck, the sides of her face, or around her waist are all good areas for your hands to rest during a kiss.
Focus on more intimate erogenous zones. If you tried some of the suggestions above and she seemed receptive, here are some more intimate areas you can work with, using light touches and soft, slow kisses.
Be aware that it's important to get consent before you try some of these. If you touch a girl in some of these areas without her consent, it could constitute sexual assault. A simple "Is this OK?" is enough. If she says yes, you're all clear; if she says no, stop immediately.
Neck, throat, collarbones and shoulders
Feet and ankles
The small of her back (toward the bottom of the spine)
Back of the knees
The inside of her upper arm
The obvious areas: breasts, buttocks and genitals
Take it slow. Don't be afraid to be a little bit of a tease. (Remember, what you might call "teasing," she might call "foreplay.") If you can stretch out the action but keep it interesting, you'll have her hooked. Try these ideas:
Show some restraint. It can be tempting to try and rush things, but the slower you take it, the more time she has to realize how much she's into you. Be patient. Your self-control also indicates how much you really value her.
If you find an area where she likes to be touched, don't overuse it. Instead, back away from it for awhile and slowly make your way back, touching everything around and up to it. The anticipation will make it more intense when you finally do touch her.
Come back to kissing. If you want to slow things down but still maintain contact, take a break and focus exclusively on kissing for a few minutes.
Leave her wanting more. Leaving before the other person gets bored is a good rule for most social interactions, but it's particularly important here. If you break off contact while she's still interested, you'll be on her mind constantly.