A bit of a woo-woo aside but I've been trying to practice more gratitude thinking in my daily life and the grocery store is an easy place to be reminded of how good we have it.
No woo woo necessary. You may be interested in checking this (and related citations) about research on gratitude and psychological well being:
https://en.wikipedia.org/wiki/Gratitude#Psychological_interv...
One thing we can do is keep a gratitude journal where we write down things we're grateful for. Can literally be grateful for the sun shining, or not experiencing an earthquake, for having the ability to write in a journal in the first place, etc.
It's so, so powerful.
Grocery stores are a marvel for sure. It's a miracle that we can get a season fruit like grapes 365 days a year.