Tackle Paperwork Immediately:
A good rule of thumb is to tackle paperwork immediately. Assign each paper a level of importance - ASAP, Pending, To File or Discard.
File Paperwork:
Once you have assigned a level of importance, file paperwork in either a file rack, stackable letter trays or file sorters. For example, if you use a stackable letter tray you could designate the top shelf for ASAP, the middle shelf for Pending and the bottom shelf for To File.
Limit Office Supplies on the Desk:
Keep only essential office supplies on your desk contained in an organizer that will hold all your essentials – pens, pencils, whiteout, scissors, paperclips, sticky notes, etc.
Limit Personal Keepsakes:
While it is a nice idea to display sentimental items at your desk, the key is to keep it minimal, which will still add a personal touch and minimize clutter at the same time.
Clear Your Desk:
Clearing your desk at the beginning and end of each day is a helpful habit to get into it. When you start your work day the next morning, a clear desk will encourage a calmer state of mind, and it will discourage clutter.
The key to keeping your desk organized is to tackle paperwork before it accumulates, keep items on your desk minimal and end each night and begin each day with a clear desk.

