Timeline gives friends the ability to view your entire Facebook history. For this reason, we imagine the first thing most people will want to do is to "sanitize" their Timeline. The good news is, it's simple to hide what you don't want showing. When you see a post you'd like to nix, just hit the pencil icon at the top of the post and select "Hide from Timeline." This doesn't delete the content from your account, but it will keep it safe from prying eyes.