Learn how to get your music into the right hands to be featured in films and movies. In order to do this you need to contact the music supervisor or the director. Music publishers can help with this as well.
The more you understand the way the decisions are made about music in film, the more you are likely to get your music to the right ears. Learn the politics of the business first.
This is a business so you have to be savvy about your approach. Another little known tip is to get in contact with film students. Work for free if there is no budget for their student projects and you could be developing a relationship with the next Michael Bay, Tyler Perry, or Steven Spielberg.