Self confidence is very important to be successful, If you are not confident, then you can become self critical and then soon you will feel guilt. Following are some good tips which will help you to build up Confidence and enhance your Personality:

Be a better listener
Read more and expand your interests
Be a good conversationalist
Have an Opinion
Meet New People
Be yourself
Have a positive outlook and attitude
Be fun and see the humorous side of life
Be supportive of others
Have Integrity and treat people with respect
Not Undermine Yourself
Acknowledge compliments
Exit your comfort zone
Affirmative Approach
Pamper Yourself