1. Do not answer calls from unrecognized phone numbers
Feel free to surprise others, but donâ€™t be surprised. It just results in unwanted interruption and poor negotiating position. Let it go to voicemail, and consider using a service like GrandCentral (you can listen to people leaving voicemail) or Simulscribe (receive voicemails as e‑mail).
4. Do not let people ramble
Forget â€œhowâ€™s it going?â€ when someone calls you. Stick with â€œwhatâ€™s up?â€ or â€œIâ€™m in the middle of getting something out, but whatâ€™s going on?â€ A big part of GTD is GTPâ€”Getting To the Point.
The rest, I need to work on. Check out the list and the comments to his post. Lots of good stuff there.