There are 115 million housing units in the United States and, amazingly, nearly 20% - roughly 21,000,000 - will have new occupants within the next 12 months. That's a lot of people moving! And research ranks moving as one of life's most stressful events -- right behind the death of a loved one and divorce. So it's important to plan ahead and use the right supplies. Collecting boxes from the local supermarket or liquor store might save you a few bucks but is hardly worth the time and effort. At best, they're likely to be smaller and more poorly constructed than real moving boxes. At worst, you may discover after your move that those second-hand boxes were either soiled or infested with roach eggs.