I would suggest that you get to know women before asking them out. Just asking everyone you find out forces everyone to consider only the superficial, yourself included. It's like duck hunting with a blindfold; yeah, you shoot a lot, but you never even aimed.

Get to know women first and let the get to know you. College is a great place for this because you can get to know each other in study groups, social functions, classes, etc. Only until you start "clicking", then ask her out.