What happens next?

How to fit ski boots
Put on the socks you plan to wear while skiing.
There will naturally be a size difference between your bare foot and your foot in a wool sock. So be sure at every stage of the fitting process to wear your ski socks.

Possible answers:
(A). Make sure that your socks are clean and that they aren't heavily stained. It is very possible that mud and salt re-skins will clog the soles of the boots..
(B). It's best to wear thin wool socks when skiing. These will keep your feet warm, but still allow you to feel the sole of your boot as you ski..
(C). Take out your floppy ski hat, mittens, and gloves and put on your ski boots. If you are going to be wearing the boots (or other single layer, removable boots), wear some mittens..
(D). Get your ski boots ready to wear. When your first boot is ready, you want to take the sock off and put on a pair of snow booties..
(B).