1. For the rest of your life begin every memo with the word “This.” It allows you to get started, and to tell the reader in the first sentence what the purpose of the memo is.
2. If it’s under €3 million, put it on a single page. This forces you and your reader to focus only on what is really important. Additional information can be added as exhibits.
3. There are three reasons for everything. Never two or four. If you have two, make another one up. If you have four, cut one out.
Proctor & Gamble Company
Unwritten and Unofficial Guidelines