Are you still using Facebook only to find friends and communicate with them in the traditional way? If you are, you should really take a look at all the different applications that you can “install” on your facebook. Just one click and you can start using them, something everybody can do. I have found many really good ones and some not so good, and I can see that many friends of mine have found them too.
For instance, you can share your videos on Facebook and you can share the places you have visited (a travel guide) with all your friends. But instead of just adding application that your friends have discovered before you, you can find them yourself, start testing and sharing.
Oh, I almost forgot. Another interesting example of a great application, you can show your friends at Facebook your latest blog posts if you are using WordPress (at wordpress.com, not if you host wordpress yourself). This is a great way to promote your blog for free.
If you want to find the best Facebook applications just visit FaceReviews.com and do a search or browse through their different categories.