Five don’ts to keep yourself happy:

Don’t expect anything from anyone.

• As if you don't expect anything from anyone you won't get hurt and you won't spend time why it has not happened or why it has happened in other way. So best way to keep your self free of tension is don't expect anything from anyone :)

Don’t think too much on anything.

• Nobody in this life take you seriously so don't think too much on any of the things :) just enjoy every moment you live.

Don’t underestimate (neither yourself nor anyone else)

• Don't underestimate yourself as everyone has equal potential, only thing is that we need to explore it and move forward and in that case there is no need to underestimate others too we just need to focus on our own tasks.

Don’t smoke/drink.

• Don't smoke or drink means, it should not become an habit , you can do it for relaxation or enjoyment purpose. If it gets an habit you won't have any control on your own mind.
  

Don’t hesitate.

• Don't hesitate of doing anything. All the tasks are achievable only if you think in positive way and try to achieve it and put conscious efforts to achieve it.