1: "Never criticize their appearance."

2: "Avoid bringing up past mistakes."

3: "Don't use ultimatums in arguments."

4: "Respect their feelings and opinions."

5: "Avoid comparing them to others."

6: "Don't belittle their accomplishments."

7: "Never use hurtful language or insults."

8: "Avoid blaming them for everything."

9: "Don't dismiss their emotions or concerns."