Remember that you have to always be thinking about the business atmosphere. What you wear at work may not be at all like what you wear outside of work. You have a professional image to uphold and you want that to reflect your business attitude. Many people make common mistakes that can ruin their overall business images. Common mistakes include wearing too much make up, not dressing conservatively, wearing wrinkled clothes, having inappropriate jewelry and not wearing clothes that fit.
Avoid these mistakes and follow the other advice given here and you should be well on your way to dressing for success.
You may wonder why it is so important to create a professional outward physical appearance. The fact is that people judge others on first physical appearance. You have to always be presenting oneself in the best light possible by giving off a professional and polished persona.