Charity begins at home...
For starters, use GNU/Linux as your OS, and/or as much Free Software as possible. If you must use Windows, at least be aware of the term Microsoft Tax.Heeeeelp! I lost my data...
We all know that feeling unfortunately, and even the pulpit thumpers are often too busy to take backups. Here are some tools and CDs that can help you recover lost partitions, recover lost files, LiveCDs can be used to recover data on a PC that will no longer boot. Also check out the Ubuntu remix CD and RTFM!!Linux Stuff
AuFS - How to write to read-only filesystemsNagios - Monitor stuff and take action to prevent problems (Take less asperin!!).
To be continued...