Eric Sink explains some compelling reasons for lone coders to use source control and with SourceGear Vault single user edition (dirt cheap), you can!
[Julia Lerman Blog]
Source control is great for individual coders, except for those of us who never need backups and never make mistakes. I am not in that category, unfortunately, and I currently use VSS for a few things and [gasp] nothing for most. Well, nothing automated. Backing up files to multiple locations and saving folder copies as versiions isn't exactly the same thing. I liked most of what VSS did for me with VS 6 but I have never gotten into it while using any of the .Net version of Visual Studio. And the headaches it caused on the largest project I used it for were enough to make me wonder if maybe no source control was safer some times. The answer was "no" because I never actually lost any data, but it was a day of stress, sweat and headaches.
Most of my larger, team-based coding is done with non-VS users (usually non-coders using non-MS products), so we normally use personal staging folders and a combined staging folder, then the live server. This works but still doesn't help when I overwrite a good file with a bad one and don't have a copy of the old one. Not that I would ever do that, though, right?