This article is the last in a four-part series that examines how litigation (and, more specifically, its results) can shape the evolution of best practices in the real estate industry. The first article examined some of the hazards of statutes of limitations; the second counseled caution in drafting "good guy guarantees" in light of certain developments in the case law; the third focused on circumstances in which contractual or contract-like liability can arise even in the absence of a written contract. This article will discuss how care in drafting guarantees—a key feature of many real estate transactions—can help ensure the availability of the most efficient legal procedure for their enforcement.