how to increase Facebook like
One way is to get all of your friends and family to like your page. It will cause the network effect, where when one friend likes the page, all of their friends will see they liked it, check it out, and if they like it too, their friends will see it. The more people that like your page, the more people will see it, causing more possible likes.
This question is way to generic and could likely benefit from searching on google, bing, or whatever you favorite search engine is.