I trimmed the bit below from a longer Carolyn Hax advice column. I thought this applies daily to all of us, but the entire column is worth reading.
The result you're going for is to stop placing yourself at the center of everyone's every gesture, be it a positive, negative or even neutral one. Your flak filter, ideally, will be set to catch only the stuff that really is about something you said, did or just are. The rest -- other people's issues, bad moods, biases, mistakes and anything else you happen to stumble across -- is the stuff you simply let pass.