I have found that if you are rolling a small amount of fondant out then you should use cornstarch in a puff, whether it is a handi wipe, a new knee high stocking or Wilton's dust puff. You only need enough to keep the fondant from sticking, however, if you are rolling out a large piece then a thin layer of shortening is what is used. This allows the fondant to move smoothly over whatever you are rolling it on and when you remove it. I usually lift the entire plastic piece I roll it out on and just tip it over and start an area loose and it comes off easily, no tearing!!!
I am sure others have their own helpful hints and, this is what I found works.