Not everyone is timelessly beautiful and perfect for every role though. In fact, most people are typecast by whatever their face, skin color, height, weight, mannerisms, etc give off as a first impression. I was always known as "lyrical girl" in elementary/middle school.
But there are things you can do to get a little closer to that "Look" that includes changing a few things about yourself in daily life. After all, your physical appearance is the first impression anyone has of you, besides a paper resume and picture. The first thing is you need to always think of yourself as a dancer first. Make choices, whether short or long-term, depending on whether you'll be able to dance if the worst happens.
- choose close-toed shoes whenever you can. Crushed toes and toenails are no fun.
- keep your nails a reasonable length
- be careful of dangerous accessorizing when going out (high heels that might rub blisters/twist an ankle, large earrings that might pull through your earlobes, cheap metal or perfume that might cause a rash)
- be careful of dying your hair. Choose natural-esque colors and highlights, or make sure that your school, studio, company, or places/people you're interested in working for are okay with dye jobs and styles.
- on the subject of hair, also look at people/places you want to work in and check out hairstyles. Is super short hair okay, or should you keep your hair a bit longer?
- piercings. Earring piercings (just one set on the earlobes) are probably desirable for dancers, actually. Earrings are fairly common costume pieces. However, be careful of multiple piercings (cartilage, nose, lip, tongue, bellybutton) on the face or body, and definitely don't wear them to auditions (unless you research beforehand).
- tattoos. Choose a smart one and a good location if you get one at all - something small, not super noticeable, easily cover-able with makeup or clothing. I can imagine it would be a deal breaker for some jobs, so beware!
- food. Your weight is important to you as a dancer, so make smart choices and take everything in moderation.
- activities. Is going golfing for 5 hours tomorrow the best idea when you have a performance in a few days? You could get sunburnt, strain a muscle or two, get hit by a club or ball. Plan ahead and be smart, you get the idea.