What are do's & dont's which should be followed for serene & calm life? I would like some rules in the form of dos &amp; don'ts to ensure happiness &amp; eradication of miseries for making life calm &amp; serene.
The don'ts: 

Buddhism teaches ten kinds of unskilful action the serious lay Buddhist to refrain from, namely:


Killing.
Stealing
Unwholesome (uncaring) sex
Dishonest speech
Harsh speech 
Divisive speech
Frivolous speech
Greed
Hatred
Selfishness &amp; ungratefulness (delusion). 


To this add avoiding the roads to ruin (DN 31), namely:


Addiction to drugs &amp; alcohol 
Gambling 
Nightlife/nightclubbing
Addiction to sensual entertainment 
Bad friends
Chronically laziness. 


Add to this: 


Avoid borrowing money leading to living beyond your means (AN 4.62).




The dos: 


The opposite of the above.
Safeguard your social relationships in the 'six directions' (DN 31). 
Practise friendliness, compassion, appreciation for goodness &amp; equanimity. 
Engage in wholesome pleasures, such as exercise, sports, outdoors nature, arts, contemplative music, charity work, generosity, meditation. etc. 




The entire list is here: https://www.mahidol.ac.th/budsir/Contents.html