For me, this is my Holiday Backup time, where I review what's been on storage for too long for the media to be trusty, and update. I adopted that 2 years is the most I'll trust the average CD ( something proven right, as 10% of the CDs I'm copying faulted me... and all burned in trusted branded media, such as SONY, BASF, etc ). Also, a good thing I always burn a mirror of every backup disk, so, once one proved faulty, all I had to do was look at it's twin.
At least, that's how I do. Since I'm here looking at burning and verification progress bars slowly growing, I felt it would be a nice idea to vent a bit, share the practice and hear ideas and suggestions