Some of the people we have to deal with in our daily lives are, shall we say, difficult. Our bosses may impose unrealistic demands on us, oblivious to the fact we may have a sick child or parent to attend to. Our relatives might meddle in our business, bringing pressure to bear on us so that we take the course of action they think would make us happy rather than the one we're confident will. (As if they would know us better than we know ourselves.) And even our closest friends can be tough to stomach on their worst days. They may take their frustrations out on us without necessarily intending to, potentially causing a rift in the friendship. Here are a few tips to prevent you from losing your cool: 1. Remind yourself it's only temporary. You may intend to stay in that job another year before moving on. The family member giving you grief -- your cousin Eddie, for example -- may only be in town for another few days. And your friend, normally of a jovial temperament, m...