Your hard drive will fail.  It is a question of when, not if (at least if you own and use a computer long enough).  Losing your data is a disaster you can prepare for.  Yet few lawyers and law firms prepare adequately.  What makes this more frustrating is the relatively ease with which you can prepare using a variety of readily-available and inexpensive technologies. 

PC Magazine has posted an excellent summary of backup tools on its web site.  The tools range from those built-in to the operating system to special purpose software and hardware.  You will find information on hardware, software, and on-line backup services.  Find the summary here.