This site is the best resource for guides on DVD backup and other things relating to video I have found yet...
First of all, you are going to want to check out the "Guides" page. Here you will find guides on backing up your DVDs to various formats, capturing analog video, and much more. After that you should check out the "Download" page. Here you will find tons of free and commercial software for things such as backing up your DVDs or converting video to various formats. Finally (when you thought this site couldn't get any better), there is a page called "The Basics". Here you will find a decent number of articles to help anyone who is new to DVD backup. You will find things such as "The Newbie Guide" and "How to Make Your DVD-ROM Region Free". So, if you are ever planning on backing up your DVDs, this is probably your best bet for a helpful resource.
P.S. Just so you know, I didn't talk about everything on the site, so there is yet even more content than what I said:-)