A few months back I started organizing my shelves. I standardised on IKEA TJENA boxes to keep my stuff in, and filled up a few shelves with them. IKEA touts the smaller TJENA boxes as being able to fit inside a BILLY book case, because they are 26cm deep, and you can stack up to three of them on a shelf, assuming you divide the shelves evenly within the cabinet. Which is true ... however, their widths mean that there is often a lot of wasted space. Here are the small TJENA boxes in a regular...