SuperDuper!

SuperDuper makes recovery painless, because it makes creating a fully bootable backup painless. Its incredibly clear, friendly interface is understandable, easy to use, and its built-in scheduler makes it trivial to back up automatically. It’s the perfect complement to Time Machine under Leopard, allowing you to store a bootable backup alongside your Time Machine volume—and it runs beautifully on both Intel and Power PC Macs!
SuperDuper’s interface confirms all your actions in simple, clear language to ensure that the end result is exactly what you intended.