10 Steps to securing your data and never losing it again-

• Back up your files. External hard drives are an excellent choice for this backup task. Then test and verify your backup. Archive your critical personal photos to CD or DVD.
• Use Windows XP System Restore Points before making any significant changes to your system.
• Write a contingency plan and practice restoring your data in case of problems. Your contingency plan should require, as a minimum:
  Locating all available backups, including dates and types of backup
  Listing and locating all original software packages, detailing updates since the original installation
  Locating and making ready an alternate computer
• Never upgrade software or hardware without a complete, verified backup available in case you need to restore data.
• Document your systems and archive original copies of your software in a safe place.
• Ensure proper environmental conditions (stable temperature, humidity and cleanliness) and proper handling to avoid static discharge and accidental dropping.
• Delete unused files and applications. Use a disc defragmenter.
• Physically secure systems from intruders.
• Deploy firewalls and virus protection.
• Prepare for physical disasters, including use of offsite storage for backup.