Before you shell out a grand or more on a new digital SLR, remember that the secret to capturing the perfect photo isn't your gear; it's mostly technique.  Sure, high-end cameras offer sophisticated features you won't find on your point-and-shoot, but unless you're a serious photographer, why not stick with what you've got? Here, we show you how to shoot a fast-moving subject, how to shoot in low light without a flash, and how to capture crisper close-ups all using cameras that cost under $400.