Expressing gratitude to another, or mindfully thinking about things you are grateful for in the moment, is a recognized technique that has been shown in studies

Expressing gratitude to another, or mindfully thinking about things you are grateful for in the moment, is a recognized technique that has been shown in studies to increase people's self-reported level of contentment. I'm surprised they don't cover journaling, another low-cost, low-effort practice that has been shown to improve subjects' self-reported level of contentment with life.