I collect a lot of things -- mostly NES games -- but a variety of other systems' games as well, in addition to DVDs, CDs, video game-related toys, some comic books, and so on and so forth. Because of these collections, I have a certain affinity for shelf space. However, as awesome as these DIY Tetris shelves above are, they just aren’t functional enough for today’s modern-day collector. But they're still pretty cool. Find out how to build them yourself (if you’re into that kind of thing).