I have found the people that speak the loudest are the people that know the least.
The greatest piece of advice I ever discovered was about advice. Everyone has an opinion, but be careful what advice you follow.
I always remember that everyone told Google that streamlining videos would never work. Everyone told Amazon that e-book technology would never work. Everyone was wrong in both cases. Google and Amazon were right. Google and Amazon remind me to duck and weave the rocks that everyone throws. The top (success) is too high for critics, and the rocks they hurl to reach.
Everyone told me e-book technology would never become popular. My worst mistake was listening to the people that obviously had no clue.
Always remember those that are busy accomplishing, are too busy to run around shouting advice.