Writing a cause-effect essay requires analyzing the relationships between causes and effects. The document provides guidelines for writing a successful cause-effect essay, including (1) avoiding logical errors when analyzing causes and effects, (2) qualifying assertions with words like "often" and "likely", and (3) writing a clear and limited thesis. Organizational patterns include multiple causes with a single effect, a single cause with multiple effects, multiple causes with multiple effects, and an alternating chain of causes and effects. Transitions and an objective third-person voice should be used.