If you're like most people, you probably want to look like you're in great shape -- especially if you have a big event or a family photo day coming up. Fortunately, you don't have to actually be in perfect shape to give other people the impression that you're fit and lean. Your choice of clothing, in addition to the way you carry yourself, can add or take away 10 pounds from your appearance instantly. Here are some simple tips for looking thinner right away without actually losing any weight. 1.