http://www.doom9.net/ is a helpful link for anything DVD related, as well as
http://www.afterdawn.comA few quick tips:
- Burn at a slower speed as was mentioned.
- Finalize discs if you are making backups of DVD movies or games.
- SIMULATE your discs.... yes it takes 10 minutes longer, but you don't lose a blank DVD. 50 cents a disc may not be very pricey, but I sure as hell hate wasting discs. Even when you get used to the process, you will STILL get a bad burn every now and then. Let the simulation fail, not the burn. I've never once had a burn fail after simulation completed successfully.
- Use Nero's InfoTool to see what type of disc you have. You want to see the media code, not the brand (sony, memorex, etc). As Peale said, next to no "brands" make their own discs, they simply buy whatever dyes are cheaper/more available at the time.
- Check
http://www.videohelp.com/dvdmedia once you know what type of disc it is and see what people say about them.
- Go buy some Ritek/RiData discs... they are my favorite. They are not as great ad Taiyo Yudens but are much easier to get and a lot cheaper. I swear by them.
Hope that helps.