Want to get in on a fashion secret? It may be Fall, but it doesn't actually mean you need a whole new wardrobe. In fact, there's a better way to buy — by investing in a few new pieces that will keep you in style clear through to Spring. Read on for advice on what's hot for Fall, what's cool for Spring, and the nine trends with staying power. Better yet, see the breakdown on how to wear each, depending on the season.