Peace and Happiness

What robs us of our peace and happiness are the little things: Criticism, traffic, annoying people, politics at work, getting rained on, & rental car counters that close early (yes this happened to me tonight). But we decide how we view the situation and how we respond. I found National still open with cars, because I was able to stay calm and look for plan B. What small things are you allowing to ruin your peace and happiness?