Get alone for a few minutes and take a few deep breaths, slowly counting to ten for each inhale and exhale.
You could also try clenching your fists for a count of five, then shaking out your hands several times; imagine getting rid of some of that frustration as you shake your hands out, like a dog gets rid of water by shaking after a swim. Do this several times, followed by a few slow and calming breaths.
