Mindfulness interventions have been linked to an increase in momentary experiences of happiness and increased ability to find joy in daily activities.

Effect of Mindfulness on Positive Emotions and Affect

Positive affect refers to one's experiences of pleasant or happy emotions on  a frequent basis.

New York University

Three main components:
- Life satisfaction
- Positive affect
- Negative affect

Diener's Model of Subjective Well-Being 

Diener, E. (1984). Subjective well-being. Psychological Bulletin,
95, 542–575.

Subjective well-being

Life satisfaction refers to one's sense of happiness with or approval of their life and accomplishments. 

Life Satisfaction in Diener's Model of Subjective- Well-being

Positive Affect in Diener's Model of Subjective Well-Being

Negative Affect refers to one's experiences of unpleasant emotions and ability to manage or overcome those emotions.

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