In this paper, RAP extracts information from our work in six states in the U.S. to examine state practices for integrated resource planning and energy efficiency. We examine how these state practices work together and are in some cases converging. Our analysis shows that there remain divergent practices on how IRP or a similar planning process is implemented, but that in many states there is regulatory attention to making changes to these IRP processes. For energy efficiency to be an effective power system resource, practices that integrate it into resource planning will be necessary. Our research indicates that those practices exist, but are not widely-used.