An ever-advancing data-dependent world relies heavily on data-protection. An essential part of business continuity , online backup should be part of your disaster recovery plans. Consider a guide written by Pilot Software on data backup.
I often cringe when I hear people say that they don't need offsite backups because they back up on a flash drive or external hard drive. I am not saying that backing up onto storage media is a recipe for disaster, but that having just a thumb drive or hard drive as your only backup is asking for disaster to happen. Storage media, external hard drives and flash drives are notorious for failing when you need them most.
Every business continuity plan must be well constructed and designed, but where does one start and what are the essentials? It is easy to miss out the important stuff.