When she asks how she looks shrug and say "could be better" this will keep her on her toes and girls love that.
Never hold her hand. This can be interpreted as a sign of weakness. (Or if she grabs your hand squeeze hers really really hard until she cries. This will impress her by showing her what a strong man you are.)
Once a month sneak up on her from behind and knock her over. Girls are like dogs. They love to be roughed up.
Call her in the middle of the night to ask if she's sleeping. If she is, say you better be. Repeat this 4 or 5 times until morning. This will show her you care.
When she is upset about something, suggest to her that it might be her fault. This will pave the way for her own personal improvement and every girl needs some improvement.
Introduce her to your friends as "some chick". Women love those special nicknames.
Warm her up when shes cold...and not by giving her your jacket... Then you might get cold. Rather, look her in the eye and say "if you don't stop bitching about the cold right now you're going to be bitching about a black eye." The best way to get warm is with fear.
Make her laugh. A good way to do this is if she has a small pet. Kick the pet. I always find stuff like that funny. Why shouldn't girls?
If you care about her never ever tell her. This will only give her self confidence. Then you can never turn her into the object she deep down desires to be.
Give her one of your t-shirts......and make sure it has your smell on it. but not a sexy cologne smell. A bad smell. You know what I'm talking about.
If you're listening to music, and she asks to hear it, tell her no. This way she'll think you're mysterious.
Remember her birthday but don't get her something. Teach her material objects aren't important. The only thing thats important is that she keeps you happy. And your happiness is the greatest present she can ever get.
Next time you are having sex, make sure you get off before she does, then get off her and leave. Girls love that.
If shes mad at you for not calling her when you say you will promise her that you will call her at a certain time of the day. This will make sure that she waits by the phone. Tell her when you call you're going to tell her a special surprise. Now shell be really excited. Now don't call.