Like many other writers and artists, I have a Facebook page and love seeing the number of "likes" go up. Besides, few things spur me on more when I get lazy than to imagine that 2000+ 'fans' will be disappointed with me if I don't finish my novel or do not give it my very best.
From time to time there are initiatives on Facebook that help people get more "likes", but there are other ways as well. One of them is Twitter.
I have a lot of followers on Twitter—roughly 13,200 at the moment—and I've got so many because I always take a proactive approach. I regularly look at the list of followers of other writers and follow those I find interesting. If they follow me back, I introduce myself with the following message:
Thanks a lot for the follow, (insert name here). Please let me introduce myself: https://www.facebook.com/pages/MakedaQueen-Makedas-Sister/115244978463 & http://ruppertlindemann.jimdo.com/oil-paintings-drawings/ Nice 2 meet U! :)
True, many on Twitter do not like DMs (Direct Messages), but they do not mind a simple, friendly introduction like this. In fact, most appreciate such a convenient way of getting to know who I am and what I do, and roughly one in ten will "like" my page while visiting it. Needless to say, I always ask them for a link to their FB page so I can return the favor.
I have met tons of great writers and artists in this manner and treasure even those who did not "like" my FB page. I am sure you will have a similar experience if you use Twitter this way. It takes a little bit of work, but is well worth the effort.