I make it a habit to leave a room exactly how I want to find it when I return. That means everything is in its proper place. These places largely remain consistent. Surfaces are clean and uncluttered. If something belongs in a drawer or hidden away, that's where it is. Check out this picture of my office at the Naval Postgraduate School for a visual representation of what I'm discussing here.
You don't see books scattered randomly on my desk, or loose papers, or office supplies other than some post it notes (which I use frequently) and a pen case. I need to frequently access the books on my table (to the left of my desk) so that's their permanent home (and they are neatly organized in orange magazine files). The same goes for the binders, as they contain materials for classes I'm currently teaching.
In other words, when I return to my office, I don't want to spend time cleaning up or organizing it. I've tended to those tasks during my previous stay. I don't have to think about where things are. I know exactly where they are when I arrive. I can get right to work on my most important tasks of the day.