What are the 6 C's of effective messages?

Courtesy, Clarity, Conciseness, Concreteness, Correctness, and Completeness

Courtesy - maintain goodwill by using the "you" attitude

Clarity - use appropriate Words, place Words in orderly sequence

Conciseness - use necessary Words, use action and efficient Words, write in active voice

Concreteness - use precise modifiers, avoid generalizatioins and opinions such as using "should", provide specific details

Correctness - verify spelling, use correct Words/phrases, insert proper punctuation, check details such as times, names, dates, places, and amounts, evaluate message appearance such as placement and style

Completeness - answer who, what, when, where, why, and how and maintain/promote goodwill