VHS and audio tapes are a no-brainer. Have you tried listening to, or watching, either of those after watching Blu-Ray? It's like being transported back in time to the land of sucky reception. But even some DVDs, CDs, and video games should be considered. If you haven't listened to a CD in years, is it worth keeping? How about that movie you bought because it was on sale and cheaper to buy than rent? Or that video game you crushed and have no time for anymore? Donate them all.