I am currently reading the book Joy On Demand by Tan Chade Meng and he describes how joy can be cultivated into a habit if you take a moment to attend fully to the joy that everyday pleasantness invokes.
So I tried practicing these methods suggested in the book :
When out on a nice day, take one moment to attend fully to the enjoyment of the weather.
And my sons must be wondering why I kept hugging them: take one moment to attend fully to the joy of that contact.
Lastly, one I always forget to do: when relieving yourself in the toilet, attend fully to at least one moment of the pleasure of relief. 😀