Many things in life are beyond your control. Particularly the behavior of other people. Rather than stressing out over them, focus on the things you can control such as the way you choose to react to other people.You can sometimes even cause yourselves more stress by attempting to control circumstances in your lives that are uncontrollable. Accept that some things are uncontrollable. Trying to control uncontrollable is a key cause of stress and unhappiness. Feeling not in control is the enemy of time management. Feeling not in control is one of the major causes of stress. Thus instead of trying to control everything, start reacting towards the situations in a constructive way as much as you can. This will definitely reduce your stress.