The only thing not to do is store them flat between two supports near the ends which could cause the counter to sag in the middle. If your unit has a backsplash built in you need to be carefull of that or else you can break it off quite easily too. I usually store my counters on the 8 foot front end of a carpeted or carboard covered surface to prevent scratching since mine had back splashes. Try to keep them as near vertical as possible and you are good to go until you can get them installed.