In direct Anglo cultures, talk 60%/listen 40%; in East-Asian, reverse it.

Call a friend with no reason once a month and suggest a meet within the next 12 hours.

Turn a dead meeting productive with three GROW questions and one clear decision.

Before gifting a foreign colleague, check 3 common cultural pitfalls that could turn it into an insult.

Before a joke or offhand remark about food/fasting/holidays, check the listener's religious considerations.

Open the meeting with five minutes of silent reading of a written memo instead of slides.

Refuse to attend or hold any meeting whose agenda did not arrive 24 hours prior, no exceptions.

Convert a meeting transcript (60+ min) into decisions and action items in 2 minutes.

In every long message you reply to, quote the specific line/question to make the thread readable.

For every 3 important digital chats with someone, schedule one real meeting.

Explicitly state your expected response times (not instant) in your signature or status, protecting your time and ending "why hasn't he replied" anxiety.