3. If you can't buy, borrow. This means lenses, which are extremely important at a wedding -- where the crucial shots range from a dark room to sunny out-of-doors, from close-up to long distance, and from one to 20 people. "I love using a 70-200mm to avoid being up on my subject," she says. If you don't have long, fast lenses, rent them -- either from websites like Rentglass.com (for as little as $14 per week) or from a local camera shop.