Frustration

when you're frustrated with a situation over which you have limited control, how do you try to get a handle on your frustration? are there any tips or tricks you've learned that are helpful?

lately, i've been increasingly frustrated w/ something in my life and that frustration is way out of proportion to the situation that sparked it. it's taken on a life of its very own and i've been finding that very fact frustrating, although i think i'm slowly getting a handle on it now.

most techniques i use, such as focusing on someone else's problems or trying to keep things in perspective are at best temporary. they provide a respite, a break.

i know it's tempting to say "fix the source of your frustration" but it's not that easy, you see: it's something over which i have at best limited influence. my previous attempts to fix it have, shall we say, not yielded the most satisfactory results.

so given that my influence over the matter is so limited, what tips or tricks can i try that i haven't already? i'm increasingly finding my frustration seeping out in ways that are extremely unusual and that's simply not acceptable.