The Requirement Walkthrough will identify relevant information sources which will be retrieved, reviewed and absorbed as the Development Episode begins. The various data may require transformations before they are easily interpretable. Such activities build the awareness that makes for the intensity characteristic of a decision making climax. However, after a climax, the focus is on the recent decisions and their implications; the data and processing that contributed to the insights are easily forgotten.
Therefore: Collect examples, test cases and customer data as machine readable examples. Use a spread-sheet program to organize and transform the data as appropriate.
Leave notes and observations as text annotations to the sheets so that key observations won't be forgotten. Keep this handy throughout development and make sure it is easily imported into the development environment when useful.
Check the program against this data throughout development, possibly by incorporating it in Test Suites developed for the application.