Smile, make direct eye contact, show others appreciation, quit bragging, stop talking about your problems, become productive, and use mistakes as a learning experience, you can increase your self esteem.
First you need to see yourself as God sees you, someone who is created in His image. If you're a Christian, you shouldn't define yourself by the things you possess or the reputation you have in society. Look at yourself as someone who brings others His gospel of eternal salvation
