Blogging about your business is very underrated. Many don't understand that when done right you can get huge return on your investment. Yes building a blog can take months or years - I should know, I've been building UltraLinx from ground up for over a year now - but boy has it paid off. At first you won't see much return from a blog, not much at all. You'll spend so much time on it that there will be moments where you think "this is the biggest waste of time and money ever" - the point is not to give up.
This infographic tells you all about how blogging is a lot better for your business that Facebook.