3 signs of complacency

Complacency definition is a feeling of satisfaction, esp extreme self-satisfaction;smugness. Most of us feels that after some time in our life, I believe, whether it’s at school, at home or at work. For example, you may feel save, not be at the bottom of the class, because you know that some of your friend have lower grades than you. When your parents scold you, you will reason because of this or that. So, what are the signs that we need to aware of?