This is an old method but it definitely works. It takes some time and some up front cost but it'll definitely pay off.
find a CPA offer for something cool like an iPad or free textbooks, etc. and then set up a domain to redirect to the offer to track your sales.
Once you have all of this, get some flyers with little tear off things on the bottom with the domain name and a small bit of info like "free ipad".
Put the flyers up around college campuses for max conversions (myself being a college student, i know my peers would fall for it). leave flyers everywhere you could imagine. hopefully people will see them more than once and begin to trust the flyer more! Put up 100 flyers with 10 tear offs and that's 1000 possible conversions. let's say 500 people take the tear offs, that's $500 in CPA conversions... and college students love to do shit with their friends so you might even get people who share the tear off with 3-4 friends!