Simply create a new profile that is not associated with your personal stuff, friends and family members. Where you only push your online business. But treat it like you would with your ordinary facebook and be real, no fake stuff, simply be you.
Go to a popular fan page in your niche and look at the most liked posts and add everyone who liked a post (30 people a day is more than enough), those are active people and have proven that they're really interested in your niche. Create a group where you'll add everyone who accepts your friend request.
Moderate all posts and don't allow any self promotion, only approve posts where members ask questions or just giving you positive feedback. This will work great if you have a blog and just keep posting new blog posts and promote your offers once in a while.
Promote your group by posting it on other popular groups that are related to your niche. Once the group is getting good engagement then you can start a fan page. Promote the fan page through your group, profile and other related groups as well.
This way, when people don't see your post on your profile then they might see it in your group or fan page. I use Facebook Blaster Pro to send out messages to people who like popular fan pages. I don't send these people to my offer, I send them a link of my fan page and most of them give the page a like and engage. So I get new page likes on a daily bases, 365 days a year.
But you're going to need a tool for scraping facebook IDs from popular pages so that you can add them on Facebook Blaster Pro to send out messages. The software I'm using is not working at the moment so we're waiting for a new update, I can't recommend it here.
Even now while I'm writing this, my software is inviting people to check out my page. I do this everyday, 365 days a year. The key to successful social media marketing is to keep adding new people on a daily bases. I do this for Tumblr, Facebook, Twitter and Google+, using software and I get traffic on demand.
I don't have to spend any money to get traffic, I simply create a post, then hit post and the traffic keeps coming without spending a dime.
So all you have to do is keep adding new people to your profile and group then invite people to like your page. That way you'll reach a lot of people, that's how you do facebook marketing. Advertising is getting expensive day by day on facebook and the ROI is crap, just kiddin
But you have to do a lot of tweaking and more money is spent while you're busy testing.