Well, there are 2 aspects here.
One is to tidy the office
The other is to keep it tidy
So Marie Kondo (Japanese organizing consultant and author of 4 books) says,
- You only have to tidy once
- First, you have to decide what you want to discard
- Second, you have to decide what you want to keep and where you are going to keep it
- Then, daily tidying consists of using something and then putting it back in the place it lives! (these bullets are my paraphrase)