You do not have to make every thought and word positive.
As you tip the balance to positive, law of attraction is right there helping you, because like thoughts attract like thoughts.
When you are having good thoughts you are on the frequency of attracting more good thoughts.
Of course when you are having bad thoughts you will attract more bad thoughts, so at those times it is important to distract yourself and think of something that makes you feel good.
May the joy be with you,
The Secret... bringing joy to billions