Look closely at the people who freely Express their thoughts. Notice how they argue their position, what methods of persuasion they use and how they react to the audience.
Practise independently. During the conversation, find the controversies and try to mentally associate them with their point of view. For example, the view TV talk show on the topic that interests you. When the opposite side will defend their position, become the opponent of one of the parties. Try to mentally form their own opinion on the illuminated question, arguments.
Believe in yourself. Your ideas are also important in the conversation as the statements of the interlocutor. Do not be afraid that you do not agree or that you do not understand. No doubt he is right.
Try during the discussion to find like-minded people who hold your point of view on the issue in question. Support will give you confidence.
Keep an internal dialogue with yourself. Ask yourself the question — why are you in this or that situation didn't state the position that you prevented. Finding the reason for his silence, try to overcome it. For example, you prevent the lack of confidence during a conversation with a supervisor at work. You need to understand that your opinionm usually interested in those matters which you are knowledgeable. I appeal to you, because you are a professional in the matter under discussion.
Pay no attention to the surroundings, distracting and embarrassing factors that often impede the right to formulate their thoughts, to find the right words. Constantly enrich your vocabulary, read more. After reading an interesting books, articles or watching a TV show discuss them with your friends, family members. Start a personal diary.
Try to Express your opinion as often as possible in different conditions — with family, with friends, in public places. Over time, the tightness and stiffness will disappear, and Express their opinion will be easier.