For this instructable you'll need:
* A knife capable of cutting cardboard
* A rectangular cardboard box you don't need for anything else (such as that box where your last internet order came in)
I assume you know that knives can be sharp and give nasty cuts if used improperly and that you know to be careful when using them. That being said, let's get started!
Step 1: Mini-shelf: removing the flaps from the box
Cut through the fold between the flap and the side of the box. Pay attention on how you cut because it will define what the front of your mini-shelf will look like. Repeat this for the other flaps and keep the opposite flaps together.