2- Wear formal clothes , preferred to be solid colors.
3- Smile , its charismatic.
4-Only YOU in the image.
5-In your workplace or office is a plus.
6-Adding your logo or signature is a plus.
7- Light or blurred background
8- Your website address clearly mentions in your bio.
9- Well groomed.
10- Avoid using many filters, keep it natural.
This post is not applicable for private and personal accounts.