It takes a person of strong resolution to manually back up data frequently enough to prevent a catastrophic loss. For the rest of us, there's task scheduling. Carbon Copy Cloner offers hourly, daily, weekly, and monthly scheduling. If your workstyle is too hectic for scheduling, you can also create a task that is intended to be run manually, or schedule a task to run whenever your backup hard drive is attached to your computer.
To schedule a backup task, first configure CCC as if you were going to run a backup task immediately. Instead of clicking on the Clone button, click on the "Schedule this task..." button. In the Scheduler window that appears, provide a name for the scheduled task and indicate when you want the task to run.