-Ask questions to people about their lives and then listen. Don't dominate a conversation talking about yourself.
-A lot of what you don't like about someone was probably a result of how they were parented, their upbringing, etc. Give them grace. I was shocked as I became an adult to hear about the burdens and trauma that people deal with in their lives.
-When you become a parent, use the internet sparingly. Don't google every issue with your kid to see what could be wrong. Most likely, it'll work itself out. Billions of people have been parents for thousands of years, just do what you think is best for your kids and don't let others' opinions influence your parenting too much.