Brain Snacks: Tasty Tidbits of Knowledge
Unlike some of his other plays, where he riffed on previous stories or myths, Love's Labour's Lost appears to be an entirely original Shakespearean joint—mad props, yo. (Source.)
In at least one production, Love's Labour's Lost has been presented with a sequel: Love's Labour's Won (catchy, right?). Most readers know the sequel better as Much Ado About Nothing. (Source.)