Shower daily and wear enough cologne to be noticed, but not enough to be overpowering.
Brush your teeth as often as reasonable and have breath mints on hand for after meals and snacks.
Nice tee shirts (without attention drawing graphics and messages) or polos along with casual baggy (but not too baggy) jeans are the way to go.
Don't get caught up on the notion that you're forgoing your individuality to appeal to the female masses; just think of it as taking the spotlight off of your visual eccentricities, and to your unique personality, which is the most important thing you have to offer.
In that same vein of thinking, it will be to your advantage to stay up to date on current events, particularly those related to celebrities and the entertainment industry.