I generally use the hand catch method but you need a lanyard attached so you can hold the controller comfortably in one hand. I have also landed on the ground and on one occasion after landing it did take off again but I had not attempted to shut it down, it only went up about a foot and was still easy for me to control. I did wonder why this had happened as when you start the phantom on the floor it will happily stay put until you want to take off.
My advice would be as soon as it has landed keep the left stick down until the props have stopped.
ABSOLUTLEY DO THIS it can restart flight otherwise
With regards to CSC I have read a few threads on here and someone posted a video of this being performed whilst the Phantom was in the air... needless to say it dropped straight out of the sky...