There is an old saying that we have two ears and one mouth, and we should use them in the same proportion. But in reality what happens is that people aren't listening; they are simply waiting for their turn to speak.
You can take this and put it into a trading perspective:
Do you observe and accept what the market is showing you (which direction is price moving?); or
Are you simply champing at the bit ready to impose your opinions on the market?
If people stopped trying to force themselves on the markets, saw price action for what it is, and acted on what they saw, it is my belief they would be more profitable.