A lot of things stress me out.
Like, but not limited to: the idea of getting less than 8 hours of sleep, auditions, not being in control of my food, logistics of any kind- like: getting out of the way of a cash register while putting my money back in my wallet fast enough (I normally throw the coins in my bag willy-nilly) or figuring out how to unload a car full of ski supplies while my mom finds parking at the ski mountain place- I have to pee and also there is no cell reception and why is it 60 degrees!?!
Also, rushing, going slowly, watching my tv shows with any distractions, speaking on the telephone, listening to voicemails, talking to retail personnel at stores and especially at the farmer's market (sigh) and being too big for my bras (this is a specific issue that few may relate to, but it may top the stressor list).... But, as you can see, I am stressed by a lot of stupid things.
Something that does not stress me out, is the idea of my own mortality. I discuss with myself all the time that I am not afraid of dying during brain conversations. Let's be honest- it would be a load off my back if I died. Or knew I was going to die young/soon. Not that I want to experience the pain of death.... I don't. But the actual dead part, I assume, will be awesome.