Don't send the first message "Hello", and then a second message with the actual message. Keep it to as few messages as possible.
Tip: set ENTER for breaks in your message, and CMD+ENTER for sending.
Use emoji, lists, bold and italic in function of scannability.
Tip: you can also enable markup instead of the formatting toolbar
Respect your colleagues' "unread" counter by isolating discussions in threads.
Tip: use the “Also send to #channel” if it is relevant.
Do not reply to a message with a message if you can also reply with an emoji.
👀 I'm looking at it
🙏 Thank you!
➕ I agree
👋 Hello or “I can help you”
✅ Ready or approved
👌 Okay
🙌 Yeah!