I became aware of Regret Minimization Framework quite recently while reading a random post on the web. With in that timeframe it has helped me take a couple of big decisions with clarity. Had I known this earlier I could have avoided taking few bad decisions.
Regret Minimization Framework is a mental model that wants you to project into the future and look back at your decision so that you can quantify which of the options could lead to minimal regret. Then, you should go with the option that will lead to minimum regret.