Libraries have been collecting eJournal data for some time. With the variety of data sources available, it is often difficult to determine its utility. This session explores the Penn State experience with navigating a number of data sources and their limitations and usefulness to advance library management objectives as well as other institutional objectives. We will look at the COUNTER-compliant JR1 and JR1B data sets and standards (how they are derived, and what issues there are with the data), as well as publishing and citation data (e.g. Web of Science) that shows faculty activity in publishing and their participation in editorial activities - what can we learn from this data? The objective of the session is to stimulate ideas and discussion for applications of the data we collect, ways of manipulating data sets, and including this process in overall analysis workflows.