1. Join groups that are related to your target audiences. Eg. if your customers are automobile owners then join groups that are related to automobile. 2. Post the Facebook widget or button on your website and blog. 3. Promote your Facebook page on other social networks like LinkedIn & Twitter. 4. Expand your network on Facebook - Make relevant friends and then invite them to join your page. 5. Ask your real friends to join you on Facebook 6. Give a reason to your Facebook page. When you invite someone give them reasons to join your Facebook page.eg. A reason can be that you are offering them some weekly giveaway or you are running a contest or you provide some unique services which will keep them updated if they join you on Facebook and so on. I hope this helps! Note: It is important that you have enough number of Fans before you start inviting your end customers to join you, the number of Fans creates a strong impression on the person for joining your page.