There are lots of ways we can make judgments and solve problems; there are complex ways and quick ways. One quick way is to use a heuristic, which is a rule-of-thumb strategy for making more efficient decisions. For example, you may be an experienced driver. Over time you have learned that when you come to a stop sign, you need to come to a complete stop or you will get a ticket. Now, whenever you come to a stop sign, you have to give very little thought at all to what behavior is required; you see the stop sign, you stop. You have a heuristic for stop signs.