Carolyn Hax: How to prop up son’s mood when pandemic makes his good news less great?

Hi, Carolyn! You once said in a column, “You can also decide on certain useful responses whenever you’re in [frustrating] situations, to create a positive association. Like a swear jar, but life-size.” I would love it if you could elaborate on this. I’m especially keen on what you meant by “useful responses” and “creat[ing] a positive association” with someone or something difficult. Any sample ideas you have in mind? And I totally missed the analogy, because I always thought swear jars were punitive. Thanks, as always, for trying to keep us sane!