What is a good alternative to Apple Time Machine?

Episode 1417 (2:08:24)

Chris from Miami, FL
SuperDuper

Chris says that his Time Machine won't let him set when the backup happens. It just does it when it wants to. Are there any alternatives? Leo says that SuperDuper is a better option. It can not only back up his internal drive, but it can make his external drive bootable so that if his hard drive dies, he'll be back up and running within minutes or even seconds!