In preparation for my trip to Europe, I needded to free up some space on my hard disk. It was a great opportunity to find out how to burn data DVDs.
I found this DVD creation article on the Gentoo wiki, and the following command worked brilliantly for me:
growisofs -dvd-compat -Z /dev/sr0 -joliet-long -R -V "<volume_name>" dvd/
where /dev/sr0 is my device and dvd/ the directory containing the desired contents of the DVD.