I know I keep rambling on about the importance of backing up your photos (I did an extensive article on the topic earlier this year, which discusses the 'how' and 'when' in detail), but one of the main reasons people don't do proper backups is that external drives are perceived to be so expensive.
Today, I stumbled across a deal that is so bloody awesome I simply have to share it with you guys; Amazon's doing a 3TB external USB 2.0 drive by Western Digital for under $130, or you could opt for a slightly cheaper less-capacity version of the same drive.
Here's a crazy thought experiment: I used to pay 12 Norwegian kroner ($2.22 in today's exchange rate) for a 1.44mb floppy disk. If this drive had cost the same per megabyte as what I used to pay for floppies, it would cost more than 4.6 million dollars... And they still say 'everything used to be better'!
Remember: It's always a good idea to replace your back-up drives every year. I've ordered mine already, so what are you waiting for?