Essentially, when you enter into an endeavor, you want to imagine what you could find out that would tell you it’s no longer worth pursuing. Ask yourself, “What are the signs that, if I see them in the future, will cause me to exit the road I’m on? What could I learn about the state of the world or the state of myself that would change my commitment to this decision?” That list offers you a set of kill criteria, literally criteria for killing a project or changing your mind or cutting your losses. It’s one of the best tools for helping you figure out when to quit closer to on time. Kill criteria could consist of information you learn that tells you the monkey isn’t trainable or that you’re not sufficiently likely to reach your goal, or signs that luck has gone against you.
Annie Duke in Quit