1) Product managers in agile development should deliver user stories from business ideas, define goals and scopes of releases, and set priorities of user stories within releases. 2) Effect mapping, story mapping, and business weighting are methodologies that help product managers accomplish these tasks. Effect mapping involves setting business goals, describing personas, generating key activities, and writing user stories. 3) Business weighting determines the order of user stories in a release by estimating the story and setting its business value to calculate the weight.