Try not to get upset or angry during a stressful situation. It raises your stress level and may make things worse. Look for the upside. If you can find something good coming from stressful situations, you may be able to change how you feel. Watch what you say.
Words have power.
Make a list of stressors. Concentrate on the 'can-do' list. Otherwise, you will be constantly frustrated and waste your time trying to change things you can't possibly control. Aerobic exercise is an excellent way to reduce stress. Find time to be alone.