Complete your about section by adding your business details, website name, and achievements etc.
Use images and videos in your post.
Know the best time to post an update on Facebook.
You can either use Facebook ads to get targeted visitors on your page.

Just invite more and more people to like your fb page

I would recommend you to opt for Facebook paid service and other way to increase the facebook likes sharing you need to keep updating your facebook profile.

If you have a good website, make a link from your website to your facebook page. Make sure you offer good content.
I organized a contest on my facebook page with giveaways for people who liked my page. This gave me quite some additional likes.

The best ways to gain likes as onehalf.transpo said but that would involve a lot of work for small businesses.

Hi, yes right I'm agree with you.

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Post great content!

For increasing the likes on Facebook people must keep the following points in their mind:
Optimize FB page info.
Try to post such content that engage your customers mind.
Share your posts on other social media sites.

you can use facebook ads

just advertise upload videos and funny staff

Always post interesting content on Facebook which attract visitor and then invite your friends to like your page. create facebook like button on web site

invite to your friends to like your page...and share groups .....

Contests
Coupons
Ebook “Like” Popups
Facebook Ads
Add a “Like” button or box to your blog
Add a “Like” button to your Website’s Header
Video Like Popups.

sharing informative and interesting post with attractive images

1.Increase your facebook page likes using S4S Technique. Click to Tweet.
2.Know the best time to post an update on Facebook. Click to Tweet
3.Organize facebook contests and see your likes skyrocket! .
4.Get more likes on your facebook page by creating two seperate pages.
5.Use Facebook ads to increase likes on your fan page.