Most valuable lesson I've learned is knowing when to stay quite

Sometimes, I pretended that I knew every single thing, but the moment I opened my mouth, I realized that action was just showing my dumb side. Especially when you're dealing with someone who is high-level. I'm not trying to discourage you from keeping making friends or talking to people, but just staying quiet at certain moments is really helpful. Sometimes, we don't need to hype those conversations, just sitting still and nodding is really helpful, especially when talking knowledge and listening to someone's problem.