The laboratory notebook is an essential tool for documenting experiments, research results, and original ideas. It establishes precedence for intellectual property and serves as evidence in disputes. The notebook should contain details of experiments, measurements, observations, interpretations, ideas for improvement, and references. Using a laboratory notebook helps prevent reinventing work, saves time, and protects research results for publications, reports, patents, and contracts. While an important scientific and legal tool, notebooks require procedures for use and awareness training to ensure benefits are realized.