For example, I meditate in the morning and then leave home and find myself in a situation in the office where two of my colleagues are arguing over an issue. When I try and intervene, one of them gets aggressive with me as well, but the feelings of peace I experienced in my meditation a couple of hours ago are still with me, using which I do not reacting angrily or fearfully. In fact, if my peace is powerful enough, it will make the other one also peaceful.
So the key is to emerge and collect positive feelings through meditation at regular intervals during the day. And then become a donor of positive feelings to negative situations as discussed above is an invaluable achievement. It is good for my own wellbeing, and for contributing to the creation of a peaceful atmosphere wherever I am, whenever required.