Ones I want to keep I will split at the belly and lie flat until dry. Using a piece of clear Contact paper I lay the skin out carefully on the adhesive. Using a second piece and lining it up carefully, I sandwich the skin. I can then use a ballpoint pen to write the snake's name, the date of the shed and any other information I deem appropriate.
I now have the skin from my 8' female hanging on the wall above the stack of Boaphile cages.