A bold approach to divination, where you simply state your predictions out loud, no matter how outlandish or absurd they may sound.
Step 1: Stand on a soapbox, in the town center, and declare your prophecy to the masses.
Step 2: Hold firm, as the villagers either laugh or stone you.
Step 3: Repeat, for maximum effect, until the townsfolk start to believe you.
For an added bonus, wear a fedora, because, let's be real, it's a prophet thing.
For further guidance, visit the appendix for more on this technique.
Or, if you're feeling adventurous, try Experiment 17: The Prophet's Soapbox Spin.