The document provides 5 rules for communicating effectively with professors: 1) Use proper greetings and address your professor formally; 2) Be patient as professors are busy and check emails for proper grammar and spelling; 3) Avoid contacting professors at inappropriate times like late at night and give them sufficient time to help; 4) Be aware of professors' social media policies and don't waste their time with non-academic posts; 5) Face-to-face communication is still important so meet with your professor in person when possible.