Most Helpful Girl
Don't wait for the girls to come to you. Introduce yourself to them and talk to them. Act like you're interested in the things they have to say. You don't need to spice up your look that much. Spice up your personality. Be more interesting, crack more jokes.
Most Helpful Guy
Be funny, that'll help.
Dress as well as you feel like, and good hygiene of course. I still recommend leaving the button up shirts (and fancier) for special events so you'll look even better. Don't use too much cologne or deodorant ever.
Just talk with as many girls as possible. They're fun. You'll learn from them too.