Do you have one of those special drawers or carousels?
Do you just keep them in a cabinet?
I have a basket on the counter behind the keurig and just toss them in there.
When I have them (right now just using the My K cup with my own coffee) I keep a variety of them in a draw where the Keurig is. Then for the extra that doesn't fit in the drawer I combine the boxes and keep them in the cupboard underneath.
In the cabinet.
In a carousel. Next to the Keurig. I do keep them in the pantry in a big basket. I try to have all the stuff in the pantry in containers. No boxes :)