Originally Posted by Zeraph

Didn't care to read the whole thread, so to OP:

Positive thinking works in the sense that you can create a "self-fulfilling prophecy" but its not some magic energy nor is it based on QM.

Positive thinking can create happiness and confidence though, and especially with the latter you will get much farther in life. You'll have more energy, be more willing to take chances, etc. Which altogether will bring you many benefits one way or another.