TL;DR
Use a coin flip as a reaction test, not as the decision itself. The first moment after the result often shows which option you secretly prefer.
Season: All year
 ## How the test works Pick two real options: option A and option B. Flip a coin and decide in advance which side means what. When the result appears, do not focus on obeying the coin. Focus on your immediate reaction. ## Watch for relief or disappointment If you feel relieved, the result probably matches your real preference. If you feel disappointed, that is a strong signal for the other option. The useful part is noticing the reaction before you explain it away. ## When to use it This works well for small decisions: where to eat, which task to start, how to spend a free hour, which gift to choose, or which version to test first. It is best when both options are reasonable and you are simply stuck. ## When not to use it Do not use a coin flip for major financial, medical, legal, or irreversible decisions. In those cases, your reaction can be a clue, but it is not enough on its own.