What PM Skills would you share with a non-PM professional to improve their abilities?

The importance of planning would be my first choice.
For my son's upanayanam (sacred thread ceremony), my wife and I used a very detailed WBS.
We did it not because it gave us coomprehensive detail of what we needed to do, and not since we were both PMPs and PMI Chapter volunteers!

Being result-oriented - driving all your activities to a particular desired outcome

Think like vertical view. Everyone is working under the project management framework even NON-PM Professionals.

NON - PM Pro. following the ethics of main project management constraints like (Cost, Resources and Time). But they are not well aware about the environmental behavior.

Interesting question!! It all depends on the audience so my following answer is based on the assumption that the audience consists of HR managers/personnel as implied in the question.

so what project management skills/techniques/practices can help HR managers in their daily activities? I would say a mix of HR management processes (a give away given the name), Communication Management & Stakeholders Management processes, Estimation tools & techniques, and project performance measurement/monitoring/management concepts would be very helpful resources for them.
Of course seasoned HR managers would be aware of many of these principles and concepts so the added value to them would come from presenting a referenced formalized versions of these processes.

Wish you good luck Laura and hope to hear how it went for you afterwards

Planning, trying to stick to schedule and of course identifying and managing the stakeholders

Be good communicator, especially good listener, and also manage stakeholders carefully are my opinion.

Commonsense.

Servant leadership. Enabling a team to create something.

Risk management is something that I would advice other professionals, if they are not doing so already.

Thank you - I will include Risk Management and especially identifying risk triggers as I have found it to be an exercise that requires participants to see the project from other perspectives and highlights unthought of dependencies.