Ethics can be a difficult-to-grasp content area of clinical psychology because it comes with few facts, some principles, and a lot of ambiguity (Keith-Spiegel & Koocher, 1985; Mills, 1984). Still, for clinical psychologists concern about behaving ethically needs to be ever present, like a critical virus-detection program that is always running in the background of the computer. This chapter begins with an attempt to ease you into the spirit of what ethical behavior is all about and to alert you to the many traps out there. A description of the facts and rules that can help you to make sound decisions follows next. Finally, we walk through an example, using a principle-guided decision-making process.