My mom gets angry at the littlest things. How can I get her to calm down a little?

My mom acts the same way. She stresses out over the littlest things. Maybe you should plan a day for you and her to just hang out and spend some quality time together. Talk things out and let her know that the way she acts has a negative effect on you and the rest of your family. Communication is everything really. Just remind her that life is too short to be busy and angry all the time.