has a neat little feature that lets you check where your account is logged in and see all of its recent activity. All the way at the bottom of the screen (in very tiny text) you'll find a notification of where your account is currently logged in. Click on the 'Details' link and you'll get a full list of where your account is being accessed from, whether it's via a browser or mobile device, the country of origin and an IP address. You can even check a recent history of when, where and how the account was accessed. And, of course, you can sign out of other sessions. This is handy in case you forget to sign out from a public PC or a friend's computer, and serves as a good alert if someone hacks your account.