New planning software can bring about greater forecast accuracy, lower inventory and better service levels. But implementing a new planning solution is a major undertaking, and maximizing the new tools requires an approach that goes beyond the implementation itself. In this article I document 4 common behaviors that can limit the ROI of any software investment, or even lead to abandonment of the software. I provide suggestions on how planners can avoid these behaviors and get the most out of newly available tools, both now and for the long term. Key considerations include post-launch training and managing stakeholders’ expectations.