My old accounting firm used to give you, when you picked up your taxes, a Crunch bar if you owed money and a Payday bar if you were getting money back. It was silly, but I still think about them every time I do taxes. I haven't used them in ~15 years because I quit the business I was co-owner of, but it's absurd how effective spending around a buck for candy bars was. We were spending something around a grand for business taxes, international taxes and US tax prep with them, so it was a drop in the bucket.