I don’t own a sat-nav, but my A-to-Z never leaves my car, I like the fact that I can add things to it quite easily, There are c1500 sites that I may have to visit as part of my job, so being able to record where they are in a couple of seconds with a pen is quite handy.
I do have a sat-nav app on my iphone though, but think I’ve only used it twice in the past 2 years!
Mini disc, I was a big fan of them, still have my player and a few discs somewhere, but they just couldn’t compete once mp3 players came out.
I’m going to add CD-r and DVD-r to the list, usb thumb drives and network media players have really done away with the need for recordable media for me.