The most helpful things people have done for me in life have been the times people tell me "you're more important than abc" whatever the task, disagreement, problem is. It always helps me when the other person steps outside what we are doing and acknowledges that my wellbeing is more important than whatever I'm stressing over.
Because of this, I also try to do it for the people I care about. Even if I'm upset about something I try to take a step back and like with my children say "hey, I wanted you to walk the dogs and I'm upset that you didn't, but you being ok is more important to me than walking the dogs so I'll handle it today" or when an employee is very stressed out or struggling I offer them a mental health day, so they don't have to ask or feel bad about it. I have told my employees many times, I can handle your reports for today, you're welcome to take a day off to focus on your mental health if you need it. In hopes that I am able to give them the help people have given me before by acknowledging that their worth is more than a minor task.