What I would often do was write a result or impact sentence or two, a summary of no more than three bullet points, and a summary of how or where to follow up. S

What I would often do was write a result or impact sentence or two, a summary of no more than three bullet points, and a summary of how or where to follow up. Someone who is in 8 hours of meetings a day and receives 200+ emails a day isn't going to read anything longer.