Create a good looking profile and provide relevant, interesting content. Being successful on Facebook has everything to do with the content you share. Experiment with different post strategies and see what people like the most. The more people share a post, the better it is for you. Some of the friends of your fans can become your fans.
Also, consider having a contest. To have a contest you need a Facebook App. There are a lot of services that offer a platform to easily create a facebook app. All of them are paid, but you can take advantage of some of the free versions. I personally used Short Stack and their free version is pretty good. You can then apply "Fan Gating" which requires the person to like your page before participating in the contest. Give a motivation to the participants to share it and you can get good likes.