The author of this method is popular Chinese interior designer Lu Wei. Recently she wrote a book where she described how to store things without cluttering the space. Here are her main recommendations:

Create a built-in storage system, not a separate wardrobe so that it won’t attract much attention.
Use the height. Vertical storage helps to organize your things much more conveniently and effectively than horizontal storage.
Attach stickers. This way, everyone will know what is inside a certain container.
Make “time capsules” for your memories. These are boxes where you can store your memorable things for a year.

6 Cleaning Methods for Those Who Want It Easy and Efficient