This document discusses keys for an efficient sales pipeline management. It begins by arguing that sales should be thought of as a process rather than an art, in order to better measure, replicate, and improve performance. It then discusses choosing an appropriate pipeline structure based on the customer's buying process, with stages reflecting their problem recognition, solution exploration, evaluation, and risk minimization. The document recommends structuring the pipeline with 4-7 stages of roughly equal duration. It also discusses controlling opportunity flow through the pipeline using validation messages at each stage, monitoring the pipeline shape for bottlenecks, regularly updating opportunities, and analyzing opportunity win/loss factors.