You can try following tips:
Fill out all information on facebook page and account with searchable information and make sure your information is correct and accurate.
You can add facebook like button to your website and blogs to share on facebook directly.
Invite niche people to like your page on Facebook
You can promote your facebook page using other social media networks like twitter and linkedIn.
Share more relevant, unique and useful information among the followers to encourage them to share more and more.
These are genuin tricks to increase likes and it will take some time to established your brand among users. There are many other tricks to instantly increase likes, but those are mostly fake and facebook automatically will remove those likes later.