Life isn't enriched by status updates from your tenth-grade lab partner, yet many of us can't bring ourselves to winnow our "friends." Here's a real friend: Facebook offers a tool that automatically identifies the people you haven't contacted for a while, then prompts you to add them to an acquaintances group. This means their notifications will show up in your news feed less often, and you'll avoid the unpleasant business of unfriending them. (
Facebook.com/Friends/Organize)
