A word of warning: Self-adhesive paper labels suck ass!

I've used them a lot in the past, and nearly all of those discs aren't readable anymore now. It looks like sticking something on one side causes the whole disc to bend slightly (think bimetal, if you remember physics class back in school), making it unreadable. I've peeled the labels back off, and some of the discs were playable after that, so I could rescue some of the data, but I'll be never using that stuff again for sure.

Better get a printer that can print on discs directly (like Canon's Pixma series) and use glossy printable DVD-Rs. They look like factory printed discs after that!