Answer:
Although there are no specific rules about creating a "professional" appearance, common sense governs the guidelines to create a professional demeanor and dress.
First, the basics of grooming are a must. This would include hair cut appropriately, hair washed, dried, and styled nicely, a shower or bath every couple days or more often if you sweat a lot or the weather is hot, and use of deodorant is a must. Nails should be neatly trimmed and the hands kept clean. Some professions discourage long nails or bright nail polishes. Remember to keep piercing sites clean and limit the jewelry.
Second, use perfume or cologne sparingly! Many people have illnesses that are aggravated by smelling strong scents. It is possible to put someone else into an asthma attack and to irritate their lungs for several days.
Third, many professions frown on wearing too much jewelry. For example, nurses should avoid dangling necklaces and bracelets since these can be hazardous when working with patients and equipment. Wear a nice watch and limit the number of rings you wear. Again, nurses in particular shouldn't wear rings since rings can harbor bacteria and germs; plus, nurses must constantly wash their hands so rings could be damaged.
Fourth, pick clothing that looks professional and is appropriate for the job. Clothing does not need to be expensive, but a well-tailored suit or pressed slacks and shirt create a neat appearance. If a job uses a uniform, make sure to keep it clean and free of stains or dirt. For example, a fast food employee can look very unkempt and unprofessional by wearing a uniform stained with grease and mayoinaise.
Fifth, take pride in your body while on the job. Wash your hands frequently to avoid giving other people germs; remember that good handwashing takes about as long as it takes to sing "Happy Birthday" twice or about 2 minutes. Too many germs are spread on door handles, shared computers, desks, and equipment. Wipe your area with Clorox-wipes to keep objects clean. Use hand sanitizer if you can't easily get to water and soap.
With a little time, planning for each day, and attention to your clothing and grooming, you can easily maintain a clean, well-groomed, and overall professional appearance.