You need to dress well to increase your self confident.
People with confident walk faster, they have a lots of things to do. They don't have all day to do it. Walking 25% faster make you look more important and smart.
- Stand up straight
Body posture is also major role in how confident you feel. Straight posture looks taller, and taller people are initially more confident then short people.
-Complement to other
If you find the best in other, you can also find the best in your self.
Speak up and don't be afraid to say what you think. You should make effort to discuss at least once in a group discussion.
You should start to work out to gain energy by physical activities and it helps how you feel about your self.