I think about storage a lot. A LOT. Unfortunately, a closet isn’t a prerequisite for making a room a bedroom, so finding room for all your stuff requires some creativity. (Full disclosure: I have a closet and an at-capacity clothing rack in my apartment.)
DIY: Inspiring Idea for Clothing Organization - not really a closet but a good idea if you've got kids who play sports. I would have loved this when my kids were playing hockey for their wet equipment.