Lighten up a little.
There is no way around it: We all get angry from time to time. But in order to avoid unnecessary stress (and all of the stuff that comes with it), it's not a bad idea to step away and take a deep breath and then carefully examine a situation that angers you before you (over?)react. Sometimes, just sometimes, our reactions can be based on our own sensitivities about a subject/situation and we find out later that what we thought was awful/insensitive/crazy/hurtful isn't necessarily a personal attack. Lighten up a little. And then later if you find the anger is justified, take a proactive approach as opposed to a hysterical approach. It'll certainly help keep your blood pressure down.