How to ensure effective communication between employees with different comm

When I ask groups to think about times when communication was really effective in a team they've been in they say things like:

• I feel heard, colleagues genuinely listen to what I want to express not what they want to hear.
• We can talk about anything that's relevant to what we're there to do: there are no taboos or no-go areas, even on contentious issues like the behaviour of the boss or colleagues' lack of focus.
• We welcome differences and disagreements, using them to stimulate new ways forward not divide us.
• We get to the root causes of problems, we don't just look at what's superficial we ask why do others think, feel and behave the way they do in a non-judgemental way.
• We make decisions we can all stick to. Even when we may not have agreed with them at first, we make sure everyone can find a way to get behind our collectively-arrived-at choices.

When I ask what thinking habits do they have that makes their list above hard to accomplish in their current context, a list similar to this appears:

• Too busy
• Too competitive
• No time
• Too many priorities
• Under pressure
• Overhwelmed
• And so on

When I observe they not only know what effective communication is (from list 1) but also what gets in its way (list 2) and suggest the solution lay not in acquiring new skills, tools and techniques but in dissolving or downplaying the thinking habits that are holding them back, they usually agree.