"Don't let someone insignificant run your life"
I think this is a quote we all need to live by. Sometimes we all get so caught up in a person or a problem they we let it consume our beings. We eat, sleep, breathe that thing. The sad part is that 99.9% of the time is it something so insignificant that is it not even worth a second thought, or even a first consideration for that matter. I have personally decided that anytime I realize something is consuming a lot of my time I will ask myself is this thing/person/situation significant and worth my time.
If it's not then let it go.