With sites like Twitter and Google Plus hot on its heels, Facebook is hustling to maintain its lead as a social network leader. Over the past few months, the site has been slowly rolling out changes big and small to keep things fresh. And it doesn’t look like its momentum will be slowing anytime soon. With so many new features and improvements, it’s only natural some of these developments would be overlooked. No worries! Here are 5 things you didn’t know Facebook could do for you: COLLABORATE ON A DOCUMENT Within a Group page, click on Docs at the top of the page and then the Create a Doc