I was reading around and I am not sure if this is some method that others use, if so great, if not, here is what I do: 1) I create a page on my site and I add top music video from youtube to it. So the page looks something like this: Title of the video (facebook like button) video description of the video or lyrics my products 2) Each time user arrives here there are two theories, do they click like becausue they like the video or the click like couse they like my site. Either way, the "unlike" has been so far 0. 3) I promote this specific page. I never link it to my main page, this is a stand alone page on my site. I submit to pligg, scrapebox and that is pretty much it. 4) sample: google "Coldplay Unstaged" and find my page. yes I am selling real product on it, but you can have a look at it at least. 5) With this method I can get around 10-20 likes per day 6) Depending on your niche you might want to experience with different niches. Example, I use also make up videos as my products are more female oriented. 7) Works for me so try it.
you should share your topics with friends, like you share photos.same they will click on the likes button and FB likes will increase.
you can as well created an eye-catching welcome tab, with relevant pic which requests for 'like'. Targeted ads are a great way to hit your audience and gather likes from potential customers.
thanks for sharing infos base on your own experience, I believe this is already tested by you and some here in the forum. thanks congrats for the great share.