When I was in business, I would get any where from one to five cardboard boxes a day from UPS. I would break down the smaller ones and cut up the larger ones to fit into one of the largest boxes. About every month or two, I would load the full boxes into the truck and take them to the recyclers. Yes, there is the temporary storage problem but, I felt better about that than sending them to the dump or burning them.
And we always had boxes for gifts or people moving houses also.