Protecting your personal information - permanently

Consumer magazine Which? has issued a paper on how to protect your personal data when disposing of IT hardware. Pointing out that fraudsters are accustomed to buying used kit on eBay and the like, then scouring discs for personal data (which becomes particularly tempting when local councils ditch PCs full of data there), they recommend physically destroying drives with a hammer.

This is excellent – if completely obvious – advice. Seeing as I don’t have a hard disc shredder, my personal preference when dealing with laptop disposal is to drive over the unit with a Land Rover, or put a Black & Decker through the whole machine half a dozen times. Does anyone out there have a preferred technique for device disposal?