One of the things I've been working at is leaving issues to settle in their own time- meaning just because I have a PITA thing coming up in a month or so doesn't mean I HAVE to get on solving it now in a big rush to get it out of the way. I've been learning that if its something I can just leave alone until action is needed quite often its resolved or changes to something more easily addressed in the meantime.
In effect, its the difference between reacting and responding. I have often reacted to a PITA by aggressively pursing a solution right now and getting wrapped up in the annoyance etc. In comparison a paced response feels unusual but a lot less stressful.
There was a lady who shared in my alanon homegroup a couple months ago- she said she makes it her business that NOTHING (her emphasis) gets between her and her serenity. Trying to make that my motto.