Before going gluten-free, I was known as the queen of lists. I made lists of things I needed to remember and carried these lists and consulted them all the time. If something wasn't written down on one of my lists, then it got forgotten.
After going completely gluten-free, my memory improved so much that now, one of my many nick-names is 'elephant brain.' Honestly. I've got a super-sharp memory. Unless I get glutened, in which case it feels like my brain is filled with cotton, and I can't remember my own phone number. It takes a good 3-4 days for the brain fog to lift after a glutening. Then I go right back to elephant brain.