Back up your images!
Back up your precious images to two different types of media if you can.
Buy an external hard drive (about £50 for a 1TB external drive) and just use it for backups of your important files.
If possible, also back up your images to DVD.
Your images are unrepeatable, and it is relatively cheap to make sure to don’t lose them.
If anybody has any questions about any area of photography, Pete will be pleased to answer them for you, just email firstname.lastname@example.org.