I learnt the hard way; Buy two drives (or other suitable back-up media) and back up regularly. The e-mail archives are irreplaceable, in fact someone should pull all the neat stuff into a set of searchable CD's and market them.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.