Don't Loose Your Cool
"Rabbi Eliezer said, 'Do not be easily angered.'"
Man has a tendency to quickly anger when he is offended. However, since there is nothing more damaging to relationships than anger, it is to be avoided at all costs. The more patience one has, the more he will enjoy pleasant and wholesome relationships.
Lesson: Anger is counterproductive. People need to be on constant guard to control their temper, in order to avoid harming others as well as themselves.
App: Make a rule for yourself not to get angry at your loved ones and preserve the peace of your cherished relationships.
[Based on the commentary of Rabenu Yona to Pirkei Avos]