The Professional Image Toolkit is an excellent resource to easily identify what clothing and demeanor will project your qualities so YOU LOOK LIKE YOU MEAN BUSINESS.
This content is so helpful to explain "levels of appearance" and body language of gravitas. Besides being appropriate for conservative workplaces, the guidelines are applicable for creative to business-casual environments, so you don't have to try to apply fashion trends to look sharp at work, while networking, applying for a new role, or attending campaign events.