Making room on a small desk

Before adding an organizer to a desk, open the notebook you use most. Include its cover, the bend of the spine, and the hand resting beside the page. That patch of space is easy to overlook when everything on the desk is closed.
Map the things you reach for
Leave a sheet of scrap paper on your desk for one morning. Make a mark each time you reach for a pen, a ruler, or a pair of scissors. The tall jar full of rarely used markers may have a prime spot that would work better for a single pencil.
Set the most-used tools within a comfortable reach of your writing hand. Put them down a few times without looking. A good spot starts to feel obvious when you can return the pen without brushing the keyboard or crossing an open page.
Try the footprint before the object
Trace the base of a cup onto a piece of paper and cut out the circle. Slide it between the monitor stand and your notebook. A cup can fit in that gap and still be awkward to use if a shelf hangs over it. Hold your longest pen above the paper and mimic lifting it out.
The spiral cup design preview uses flutes that turn around the outside. If you like a sculptural shape, check its widest point as well as its base. That extra width matters when two accessories sit side by side.
Keep one clear landing spot
Make a place for today's mail, a second notebook, or the mug in your other hand. Try keeping that space clear for a week. If you repeatedly set something in the same corner, move the accessories around that habit.
A small desk can still hold a personal piece. A nameplate or a framed scene on the far edge stays in view while the space nearest your hands stays available for work.