Asking a judge to step aside is the most awkward motion in litigation, and most lawyers do it badly or not at all. This article explains how judicial disqualification actually works: the two federal statutes with very different mechanics, the objective appearance standard that governs most cases, and the extrajudicial source doctrine that defeats the overwhelming majority of bias claims. It covers the mandatory grounds that require disqualification regardless of appearance, the financial interest rules that are strict liability, and the constitutional floor below which due process itself requires recusal. It explains the practical mechanics — who decides, when to file, what happens on appeal, and how remittal works — and the professional consequences of getting the timing wrong. It covers judicial conduct complaints, which do a different job than a recusal motion, and closes with what a careful practitioner does when the concern is real.