You know the how the story goes: you are at the grocery store lugging around that gallon of milk, but you have this tingling in the back of your brain that there was something else you needed to get as well.  After walking down every single aisle waiting for your memory to trigger, you give up and just go home- only to remember you are completely out of cereal.  This is where a fridge-mounted notepad comes in handy to jot down those needed items as they run out.  Better still is a mod notepad that you've made yourself.