Invest in a motorcycle, a pair of shades, and a badass leather jacket.
Wearing no helmet, drive your motorcycle right up to the front door and park it there, because you are a badass and you'll park that bitch wherever you please. When you get off your bike, take a quick but calculated look around, make sure everyone sees you doing it too. Don't take off your shades. Adjust your jacket and enter the building.
When you find your classroom, open the door with authority, let it bang against the wall. Take three steps into the class room and do another calculated glance around. Once everyone's stopped gawking at how awesome you are, give them what they want and remove your shades. At this point, you should be hit in the face with several pairs of panties. And thus, you have achieved your coveted status as hottest guy on campus.
Take care of yourself but don't make it too obvious with half a pound of gel in your hair, splotches of cologne and designer clothes. Do some team sport or go to the gym with a group of guy friends. Wear jeans and a T-shirt and make sure you don't smell bad.
The rest is achieved with character and attitude. Girls are more attracted to that than your biceps... though well toned muscles are a turn on.
it always helps to smell good, so get something that you think more girls would like. clothes? well be a little on the edge yet classy, if that makes sense.. but with muscle, just at a good amount.. as in enough that people can see :) not grossly huge.. I hope I helped:)
Think GQ, Bond No. 9 NY or Bvlgari Cologne. You can go in a few directions with this; rugged, dirty and sexy, clean and polished, or the more alternative rocker "looking good without looking like you tried to hard". Athletic and toned goes well with all your desirable looks. You don't want to over do the tanning, natural is the new trend. Confidence, and independence are also always big turn ons. A big smile, handful of humor, splash of charm and 'wahlaa' love potion #9. Above all else, be yourself.. "don't fake the funk".
You have to be the alpha male. Good posture and confidence will generate head turning and presence when you walk into a room. Muscles will help; women will look at you based on your body even though they'll say it's not important. They always look. Good smelling cologne attracts them as well, but don't wear axe because the average guy wears Axe. You have to step it up a notch. When girls look at your way, give them a smile. Make them feel comfortable.