1. Post comments on Facebook's group and Business Pages.
2. Like other Facebook members pages
3. Join group related to your business.
4. You can use tools to get automated Facebook likes (like addmefast.com, like4like.org)
5. Respond every comments on your page.
6. Post trending updates on your page like festivals or popular articles.
7. Share popular website posts like storify, tumblr, wiki etc.
8. Update your page frequently.
9. Share you Facebook page to the other popular sites like Google+, twitter etc.