What's your backup solution?

I'd like to address the Verge hivemind with this simple question. Now, any PC user worth his salt has at least one method of backup, but I'm always on the lookout for new ideas, especially if they're simple. In reviews from sites like The Verge, backup software is addressed if included, but overall, the market for backup software seems to be stagnant to nonexistant. What's your solution?

To start, my (admittedly simple) solution is to copy-paste everything in the C:\users\username directory onto a 1TB hard drive on a monthly basis, replacing old backups as the hard disk becomes full.