I had a college roomamte that had trouble remembering that. So he got a large piece of poster board and put it up on a wall. Being helpful “elves,” insert evil grin here, we helped him out by writing it on pieces of paper we put everywhere. It was taped to the face of his clock. It was on pieces of paper in the pockets of his coat. It was written on the toilet paper. It was on a small piece of paper inside his stapler. It was inside his shoes. Inside his books.
He was not amused.