How we feel and what goes on in our heads determines how we behave in the outside world. Often we are our own worst critic. Being clear and warm in our communication with supporting body language will come across as assertive.
Assertiveness is a skill regularly referred to in social and communication skills training. Being assertive means being able to stand up for your own or other people’s rights in a calm and positive way, without being either aggressive, or passively accepting what is wrong. Assertive individuals are able to get their point across without upsetting others, or becoming upset. Those who behave assertively respect the thoughts, feelings and beliefs of other people as well as their own.
It means being able to express feelings, wants and desires appropriately, and is an important interpersonal skill. In all interactions with other people, at home or at work, with employers, customers or colleagues, assertiveness helps you to express yourself in a clear, open and reasonable way, without undermining your own or other people's rights.
Assertiveness allows individuals to act in their own best interests, to stand up for themselves without undue anxiety, to express honest feelings comfortably, and to express personal rights without denying the rights of others.