State your full name. Use your pen name if applicable.
Give your profession and the company you work for if it's relevant to the article.
Provide information that shows you are a credible authority for the article's subject matter. This includes listing pertinent writing experience and education.
State your contact information such as email, website or telephone number. If people enjoy your article, they will want to find out more about you.
Give people a reason to contact you by offering them a free resource. Offer readers a free newsletter or free books.
Write in the third person and keep the byline professional. Don't include information about your personal life such as how many kids you have or how long you have been married.