the best way is to advertise through FB ads and post great content. its not easy, it takes a lot of time, but thats the point of it
Post often, but not too often. Posting often increases your visibility on people's timelines, making it less possible for your posts to be overlooked or skimmed over. If you can become known for posting interesting and funny status updates, photos and videos, people will be more likely to stop and take notice when your name appears on their feed. The more people who actually pay attention to what you're posting, the more people who'll be inclined to like each post. Another method is to buy facebook likes, I'd recommend you to try SEOclerks, many freelancers here provide facebook likes at a cheap rate.
Use FB ads. If you don't want to spend money on it - be active, post often (no more than 3 posts per day), post multimedia - photos and videos (the rest just doesn't work that well anymore). If you want to post a link to your website - don;t directly put the link in the postbox, instead - post a nice picture from the content you are linking to or a picture that is somewhat relative to the content and put the link in the description. Its a simple trick that actually does the job.
I'd say I don't even trust Facebook ads anymore. The fact is that many 'fake' accounts are 'Like'-ing pages to fade into the crowd of genuine 'Likes'. I once did a campaign of over 4,000 'Likes' but have less than 200 reached at its peak. I've never had more than 20 'Likes' for any posts. I'd agree with the above posts where the best way is to build relationships and join communities, before inviting them to 'Like' your page. It will be slow, but at least you get quality.
There is one key word here (*hint* its genuine *hint*) Genuine Likes can be obtained only one way - by engaging people to Like your page more. How? Well how do you make people Like stuff in the first place? You post interesting content, you aim to be unique and engaging, you hang around communities and people that are close to your interests or area of business, you use your friends as advertisers...the thing is you don't have to do anything extraordinary. If you are really interested to win people that are really into your company and/or product you shouldn't be aiming to acquire heaps and heaps of new followers. Genuine building of whatever (links, likes, followers etc.) is a slower process but more rewarding in the end because you are sure that most of them will be interested to know what you have to say. Ads and paid likes will get you the numbers in no time, but what then? Do you really want 1000 likes, from which no more than 5-10 will know what you're really all about, or 100 likes but all of them being there because they find genuine interest and value in your services
Keep it short and sweet. People are lazy. And impatient. They want to be entertained and they want it now. Therefore, long-winded or wordy status updates are more likely to be given a cursory glance, then quickly scrolled past. Remember that Facebook is not a blog - people don't want a summary of your day, a description of what you ate for breakfast or a lengthy opinion piece on the latest episode of Breaking Bad. They want short, amusing anecdotes or concise updates on cool, interesting things you've seen or done. So give the people what they want. You can also buy facebook likes from SEOclerks, hire an expert from here and that expert can you help you in providing facebook likes at a cheap rate.
The most important thing is to post a gualitative content and do it regularly, also you can held different competitions to interest the audience.
regularly update your page with relevant content or funny pics and ask users to hit like or comment that way you can reach wider
Quality content is the ultimate answer. Also try to engage people into conversation, ask questions, post images and infographics, etc.
You can think on sending invitation to you total friends who are in your friends list and ask them to like your page. Post the quality content which is related t your title page. Commenting on other pages may help you to build likes. Tagging also help you.
The more you engage, the more likes you will get. Keep active on all your accounts and engage on other peoples' pages.