Minor increases in happiness can be achieved through activities like getting an extra 10 minutes of exercise, 20 minutes of sleep, or practicing gratitude, which have a greater impact than significant income increases beyond a certain point.

“the slope might go up a teeny tiny like negligible bit but it doesn't go up as as much as say getting extra 10 minutes of exercise in or another 20 minutes of sleep or scribbling the things you're grateful for all those things will impact your happiness much more than like quintupling your income”