The Socrates rule. Be an elitist, not a democrat, when it comes to opinions.
Lots of people (including me) will offer you opinions, rules, ideas, philosophies etc to navigate your way through life. DO NOT LISTEN TO ALL OF THEM! There is a saying "everyone is entitled to their opinion", that is true. But it is not true that everyone opinion is worth of being heeded. Carefully weigh the opinions, and the people giving them, before taking what people say to you to heart.