Assessing the effectiveness of previous cancellation decisions is often overlooked in favor of current competing priorities. The authors outline their approach for evaluating journal, journal package, and database cancellations; how they evaluated whether the library could adequately support the needs of academic programs after substantial cancellations; and how to ensure the evaluative criteria used for collection review are useful and meaningful. They also provide a framework for assessing database cancellations and the criteria used in their collection reviews.