I created an Automator action to sync the contents of my USB thumb drive with my machine. I keep a folder on my machine called "THUMB backup". So if I loose my thumb drive or it gets damaged, I'll always know exactly what was on it when it last left my machine. I saved an Automator workflow as an application. So when I am about to eject my thumb drive, I double click the icon and the contents of the drive are synced with my backup folder automatically.
Also, from time to time my parents want pictures of my kids. Since my 6.1MP images are rather larger, it's impossible to email Mom and Dad 150 Megs of stuff at a clip. So I have another action that, once all my pictures are dropped on the Automater icon, it resizes all the pictures to 1024x768, zips them up, attaches it to an email and BOOM! I'm done. Imagine having to do that by hand! It would take all day. Automator does it in a minute or two.
You can do anything with Automator.