While sitting around lamenting our millennial lives, a friend of mine shared this morsel of wisdom she'd gotten from an older acquaintance. It was something like, when you're young you have time and energy, but no money. When you're middle-aged, you have energy and money, but no time. And when you're old, you have time and money, but no energy. Such is the quagmire of youth. While we're getting bombarded with messages telling us to YOLO, to "dance like nobody's watching," and love like we've...