Hi, that is my desk. A clean workspace.
Maybe your desks are similar to mine.
Step 1: Locate and Mark the Perfect Space
There is space below the desk. But we would need to be careful about the visual noise and the comfort for our legs.
Use a pencil to mark the "hidden" space.
Step 2: Use Hooks to Hold Cases
With the help of some hooks and cases with holders, organize some tools (solder, screws, screwdrivers, nails, etc.) there.