Google's rolled out an "Inactive Account Manager" -- a dead-man's switch for your Google accounts. If you set it, Google will watch your account for protracted inactivity. After a set period, you can tell it to either squawk ("Email Amnesty International and tell them I'm in jail," or "Email my kids and tell them I'm dead and give them instructions for probating my estate") and/or delete all your accounts. This has a lot of use-cases, from preventing your secrets from being tortured out of you (before you go to a protest, you could set your dead-man's switch to a couple hours -- if you end up in jail and out of contact, all your stuff would be deleted before you were even processed by the local law) to easing the transition of your digital "estate."
No one wants to think about their own death, but not thinking about it has a zero percent chance of preventing it. The Inactive Account Manager (great euphemism) can send your data from many Google services to your digital heirs, alert your contacts, delete the accounts, or do all or none of the above. It affects Blogger, Contacts/Circles (in Google+) Drive, Gmail, Google+ profiles, Pages and Streams, Picasa albums, Google Voice, and YouTube.
It also serves as a useful self-destruct button. Don’t want anyone watching your stupid YouTube videos after you’ve long forgotten that you had an account? Don’t want your kids to find your password notebook years after you’re gone and read your dirty chat sessions with their dad? You can have your account auto-destruct after trying to reach you using other e-mail addresses and by text message. You know, in case you just get tired of Gmail and wander off somewhere else.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.