Every person you meet is better than you at something. At times this might not be relevant to you or your interests. Nevertheless, realizing this you might be humbler when you talk to others. On top of that, realize that everybody is also fighting their own invisible demons. Some may not worry about the same things as you do but every individual has something they're struggling with. Be kind.
You aren't put on this earth to be nothing and the same is true for everyone on this planet. You can't even begin to realize the inner reality of another human being. We simply can never know for sure. It's also impossible, through brief interactions, to know what their larger role in the universe is. Allow them their role and don't impose yours on them just because you disliked them briefly for a moment. Who knows what value the bring toothers or are yet capable of bringing to the world.
Title prompts are taken from The Daily Stoic Journal by Ryan Holiday and Stephen Hanselman.