Re: How do you back up your photos?
External HD is now so cheap I don't bother with messing about with DVDs. For archival storage use 250GB and/or 500GB portable drives. I just paid £40 for a 500GB one, now that my 250GB is full. I also have a 1TB external drive connected to the PC to back my main drive. The computer itself has two 150GB drives and I only keep original files on it for a couple of weeks. External storage is so cheap and quick it isn't a problem. I used to make two DVD back ups of my pictures. It was a pain. IMO the DVD is dead as a storage medium I now only use them to give people pictures.
On line storage? Even if you pay Flickr or any other Company for a pro A/c they will close it at their discretion. You are putting your trust into a company that couldn't care less about the individual.