The debate whether or not to Google potential lovers is a tricky one [1], but the truth is, there's no harm in it. Finding friends, acquaintances, or even strangers online is a simple and discreet way to learn a little bit — or a whole lot! — about them. You can brush up on their online reputation and verify their stories (hey, hiring managers do it, why can't you [2]?) or simply see what they are into. There are plenty of people who keep their social network accounts private [3], but you can always find something. Looking for more information on your sister's new boyfriend, a blind date or co-worker? Here are some surefire tips to strike Google gold.