In our previous house, we utilized every single closet to store our clothes. Shoes were in the office. Coats were in the hallway. The hampers occupied all of the floor space in the master bedroom closet. It was a horrible system.
Now we're lucky enough to have a master suite with a walk-through closet (it has a door on each end). When I first saw it, I decided that I was going to do two things: 1) hang my clothes by category and color, and 2) replace all of the hangers so that they match.
These two things make the closet well, at least my side of it look so organized. And it makes finding what to wear a snap.
Below is one of my favorite closets, which I don't think was included in HC's round-ups. It's from an old issue of Living, Etc.