How many times have you been advised to check your Facebook privacy settings (see Graph Search on page 8)? And how many times have you said to yourself, "I'm pretty sure my settings are OK," or "I'll check 'em later." Part of the problem is that it's hard to know what level of protection is best, especially with the rapid pace of change on Facebook and other social networks. Facebook actually provides a good, detailed explanation of privacy settings and privacy-related issues. It's worth taking the time to read.