Consult your favorite movie theater chain's website and subscribe to its newsletter or rewards program for opportunities to win free movie tickets.
Listen to local radio stations for giveaways. They often sponsor or host premieres and are allotted a certain number of movie passes as prizes for listeners to win via phone or on the station's website.
Read movie and entertainment blogs. These sometimes give away movie passes to give away to readers, or at the very least may offer leads on where to find passes to movie premieres in your city.
Check out film studio websites for premieres in your city and how to win free movie tickets. Studios will host contests on their sites or direct you to sponsors that are giving away tickets. Some have clubs that you can join to win tickets to premiere screenings.
Read local newspapers or free publications, which often host or sponsor premiers and have movie tickets to give away to readers.