- Happiness and time graph: life is about riding the waves of ups and downs, and the more risk averse you are the more boring your life is.
- Hedonic treadmill: psychological theory that describes how people tend to return to a relatively stable level of happiness regardless of positive or negative life events. This is also known as hedonic adaptation.
- The derivative of the hedonic treadmill can be quantified into a happiness chart.
- According to the book The How of Happiness 50 percent of our happiness is determined by our genes, 40 percent by our activities, and 10 percent by our life circumstances.
- Burst spending: the intermittent fasting of spending money. You can apply this to food or housing. The derivative of your happiness
- "Without the bitter the sweet isn't as sweet."