Tack up an inventory of your pantry and store it affixed to a clipboard and a pencil on a hook on the inside of your cabinet door so you can quickly scan before you grocery shop. (thespruce.com)
I've seen people use the inside of cabinet doors before to store things — like hanging measuring spoons or utensils. (glutenfreecat.com)
If you are painting the inside of the cabinet doors, you'll want to flip them over and use the same process before putting the second coat on the front. (remodelaholic.com)