If your'e serious then here's some tips
Personal grooming:
- Brush your teeth
- Shave
- Comb, Style your hair, but not too much
- Deoderant -_-
Clothes:
- Wear what you feel comfortable in, but something that you look good in as well
- Don't over accessorize (like Grills, rings, Chain hangin' low)
- Accessories are good if used well. Like if you have a long neck, wear a pendant or thin arms a wrist watch (IDK

)
Personality:
- Be nice with her, but not everytime. Sometimes you gotta be a bit ummm...'Opposite of nice' with her to show that you're not some kinda Nice robot or something
Sounds like hard work, but it's worth a try. Most of the stuff on this list is everyday stuff you should be doing anyway