While pouring coffee this afternoon, I got some on my shirt. As Hashgacha would have it, I was wearing this shirt. I instantly dabbed some water on the spot in question and recalled the previously referenced post.
Interestingly, on the way home from work last night, my hisbodedus included the following:

Hashem, may you help me in not allowing the middah of Shalom to waver in my dealings with others or with myself. May your assistance help me not compromise on those things that are important to me and may negative influences not affect me, or be absorbed like a stain on me. May I use every opportunity to grow in the proper direction.

I often find lately that certain things like patience and tranquility seem to get hijacked from my control. Understanding that these are simply tests may help.