Fix it and move on. Breathe The more oxygen we have the better our bodies function. Take deep breaths when you are stressed or angry. This will slow your heart rate. The deeper and more controlled the breath, the more positive the effects.
Many people encourage stress by saying yes too much.
Pick and choose the activities, projects and favors you do. This will allow you to save your time for the things you either have to do or really want to do. Trying to be perfect all the time is very taxing. Strive for perfection on a few tasks, but understand that almost perfect is good too. In addition, set goals that are reasonable for your needs and skills.