We usually make hundreds of decisions every day that affect our relationships, attitudes and the course of our lives. Mental models help us to represent these real-world problems in our minds. They can help us to quickly find the best solutions to problems, especially when it may not be clear how to solve them. Knowing a lot of mental models helps increase the speed at which you arrive at good decisions. Next time you’ve got a decision to make, try out these mental models for a quick and effective decision.