Just got off the phone with Bill Grosso, who shared with me his simple trick for organizing his work.
He has a three column Excel spreadsheet. In Column 1, he lists the project. In Column 2, he lists the person. In Column 3, he lists his quick thoughts.
When he needs to talk about a project, or he is about to meet with a person, he simply sorts on the appropriate column, and all the relevant information is right there.
We both agree that this is a 37Signals product waiting to happen!