Most desk tidying fails the same way: everything loose goes into one large container, the container becomes a bin, and within a fortnight the desk looks exactly as it did. The fix is not a bigger tray. It is sorting by how often you reach for a thing rather than by what the thing is.
Zone 1: the hand's reach
Everything you touch several times a day, within arm's reach without leaning: the pen you actually write with, your phone, headphones when they are off your head. Keep this to five items or fewer. A small caddy or a stand for each is better than one container, because a container invites a sixth item.
Zone 2: the daily edge
Things you use most days but not most hours — a notebook, a second pen, a cable you plug in each evening. This is the back edge of the desk or a shelf riser. A tiered organizer earns its place here: it uses vertical space that is otherwise dead, and it keeps the items visible, which is what stops them migrating into zone 1.
Zone 3: the drawer
Weekly or monthly: the screwdriver set, spare batteries, the pile of cables you do not use but will not throw away. These should be off the surface entirely. A set with a case that closes is the difference between a drawer and a junk drawer — the case is doing the organizing, not the drawer.
Zone 4: not on the desk
The honest zone. Anything you have not reached for in a month does not live on or in the desk. A shelf, a box, or gone.
Do the zones before you buy anything
The common mistake is buying organizers first and then deciding what goes in them. Sort into four piles, count each pile, and buy for the counts you actually have. If zone 1 is three items, you need a small caddy, not a large one — and a large one will be full of zone 3 things by the end of the month.
The surface itself is a zone marker
A desk mat does more organizational work than it is given credit for: it draws a visible boundary around the working area, and things outside the boundary read as out of place. That is most of what "tidy" means in practice.
Desk Organization has 14 pieces across caddies, trays, racks and drawer units, each listing its footprint and compartment count so you can match it to a pile you have actually counted.