In that case, I would just mention that if you improve your own mood, that is likely to improve the mood of people close to you and in your social network in general. Both happiness and sadness are contagious.
Also, maintaining a positive mood is likely to make your more efficient at other tasks.
That’s not relevant. The claim being made is that the best way to increase other’s happiness is to have fun yourself, at least some.
Fair enough.
In that case, I would just mention that if you improve your own mood, that is likely to improve the mood of people close to you and in your social network in general. Both happiness and sadness are contagious.
Also, maintaining a positive mood is likely to make your more efficient at other tasks.