Actionable takeaway from Amelia Walter-Dzikowska's talk: open chat messages with your actual request (e.g. 'hi, I'm writing about X, could you reply when you have five spare minutes?') instead of 'hi' followed by silence or 'how are you, do you have a minute?' — which frustrates focused receivers and causes unnecessary anxiety when from HR. Spreading the norm through the team makes everyone's life easier.