Gofobo.com provides a way to find tickets to advanced film screenings in your area. As of 2015, the website is free to use and asks you a short series of demographic questions that determine which movies you might be interested in seeing.
One thing to keep in mind while searching for free movie premieres is that most advanced screenings are held in major cities. Also, remember to show up early. Gofobo.com gives the disclaimer that unless otherwise specified, no seats are assigned or guaranteed. To redeem your passes, simply log onto your Gofobo account, choose the screening you want, and print out a copy.