Some of the standard 'test taking' hints shouldn't work, I use a random number generator to decide which answer slot gets the 'correct' answer. (I started doing that back when I was teaching years ago.)

My wife once took a test with 100 true/false questions on it. If you selected 'false', you had to explain why. It turned out that all 100 statements were true, but she got credit for several of the ones she marked as false, because of how she explained her reasoning.