1. Get creative with your desk setup.
2. Pop out for a second and pick up some donuts for you and your co-workers.
3. Leave an anonymous note for a co-worker. A nice one.
4. Start a communal playlist, and challenge your co-workers to dance like no one's watching.
5. This will inevitably lead to a dance party.
6. Delight a co-worker with one of these origami frog hoppers.
They're easy to make and adorable to hop. Try not to smile when one of these crash lands onto your keyboard.