If you ever wondered why personal finance books and magazines present such a convoluted picture — or you want to convince a young adult to embrace simple techniques to complete their adulting, you could do a lot worse than pick up The Index Card: Why Personal Finance Doesn’t Have to Be Complicated. The concept is that you can fit all you need to know about personal finance on a handwritten 4×6 card, and you can, removing both obstacles to getting started and fretting about whether you are doing it right. Simple, to the point, easy to read, perfect.