Some suggestions that have helped me:
-Do activities with people in the beginning -- For me, conversation comes so much more naturally if I'm working on something, or walking, or doing anything that doesn't focus solely on the other person. Group projects for school are the perfect opportunity to socialize with people in your classes. Most extroverts in the group will get off task anyway. Just go with the flow, become engaged in their off-topic conversation, and go against your natural impulse to keep everyone on task. Socializing in college also becomes a lot easier once you're into your major classes.
-Find people who have common interests. I was lucky, I studied abroad...it made learning to socialize so much easier. I was stuck with the same 15 people for 3 months of my life...you realize pretty quickly that you either learn to get along, you navigate a foreign country alone (not recommended), or you kill one another -- socializing seemed like the best option. People can be suprisingly wonderful once you open up. Yes, vulnerability sucks, and it's terrifying...and yet, the risk is worth it if you choose quality people.
- In finding people with common interests try Use the Internet to get off the Internet! - Meetup.com
, or if you'd rather find a date, then you could always try online dating. Use a site like match.com that you actually have to pay for -- that way you weed out a lot of people simply because people who are paying will likely take it more seriously. Then, you can safely meet people online, and by the time you finally decide on someone to meet you know you already have stuff in common.