Having a unique style and being in good shape are really helpful to start off.
Next, you gotta expand your friend network. I wasnt in a frat or on a sports team, but I knew several dudes who were. And I went to a lot of parties and events and talked to people. Just being friendly and networking helps a great deal. I met a ton of people while I was in school, and girls I dated were impressed by the fact that so many people knew me when we went out.
If you can be friendly and meet a bunch of people while in school, then the unique style and being in shape part will tie into that and make it so girls wanna know you. Your school may be different than how my college was. I was in a small town, and the frat guys and sports dudes were friendly party bros. They werent too clicky and werent douchey to people.
I know some places can be a lot different though.
EDIT: Just to add, since i saw youre other thread. You arent a bad looking cat, and you have a good height women like. So long as you style is on point, and it resonates with the women you target, you should be good. Just say confident, friendly, and not over-analyze things in your mind. Some chicks will dig you, and some wont.
Your location and target audience will matter a lot. I had an easier time than other guys because I went to a liberal state school that wasnt too big, and was almost 65% female. Add to this that the school is known to draw in an LGBT crowd because of the friendly liberal town, and you get a school with a lot of girls competing for the straight guys.