It's one of my favorite activities. I know they might not grow everywhere but every time I find a nice patch of white-dwarf clover I love just spending 5 minutes leaning over and looking through it. You can almost always find a 4-leaf one with some patience and a little luck, and it's such a calming task that gets you looking at nature in the middle of your day.
Doing this is the closest I'll ever get to successfully meditating