Okay, the easiest route is the fastest route. Unplug the freezer, get all the food out in a hurry, pack it in coolers or boxes with towels and blankets. Leave the door open and do one of two things, plug a kettle inside and let it run or get a hair dryer and run it along the sides of the freezer, if it's an upright you have to do the same with the shelves. For a box freezer you can quickly release any big chunks easily from the sides and let it all fall into the bottom. I then take a dust pan and scoop everything up into a pail and then dump it. Once all the ice is gone, then just take a clean cloth and go over everything to finish with any sticky stuff left behind. Plug the freezer back in and reload, neatly, the food. Like I said fast and clean.