I am not sure if what I am describing is considered meditation per se but any time I am entering into a stressful situation, for instance a job interview, I find it helps a lot to take 5-10 minutes or so and close your eyes, take some long, slow, deep breaths and just center yourself.
OK, runon sentence x10 there - sorry.

Also, just the ability to completely zone out can be really helpful for your soul. It lowers your blood pressure and can act as an extremely calming influence. It also enhances your mental and physical flow, in addition to increasing your focus.