When you hear the voices of conventional thinking, here's what you can do. Make them sound like Donald Duck. It's rather difficult to take anything Donald says seriously, so make those voices sound like Donald and enjoy a good chuckle.
Then turn the sound down on them. Oh, let those voices rattle on and on and do their naysaying job--you just don't have to listen to it. Imagine them as coming from speakers on a radio or something and just turn the knob so you don't have to hear them.