In one sentence, describe what the following article is about:

Once you've signed with an agent, you will build your portfolio, which will help you get hired. The agencies will help you get the chance to go to modeling interviews, which are also known as go-sees. So, start going to the go-sees, act professional, and don't get frustrated if you don't get a gig right away.  The agency can't guarantee you work, but a good agent wouldn't take you on if he or she didn't think you had a solid chance at finding some great work. Have perseverance. You won't get a gig with Calvin Klein on your first go-see, despite what you may hear. Whether you've made it big or are just starting out, you don't want to develop a reputation for being ungrateful, rude, or even late. If you want to last in the industry, here are some things you'll have to do to meet the standards of the profession, just as you would with any other career:  Be prompt to appointments. Be courteous and professional to everyone you come in contact with. Consider investing in a personal trainer to help you stay on a balanced diet and to attain exercise goals for optimal muscle tone. Take a meticulous approach to your grooming and skin care regimen. Retire for the evenings early on the nights before you have to work. Plenty of sleep will help you avoid dark circles under your eyes and give you a more rested and healthier appearance to those you are working for. Though everyone hears the story about the male model who was discovered on a Russian cargo ship or just when he was hanging out at a bar in Vegas at three in the morning, the fact of the matter is that most male models don't just instantly get discovered and have to keep working hard even after they sign with an agent. This means that unless you are among the very few lucky male models who can solely survive on their modeling income, you'll need to keep your day job or find another source of income to keep you going. If your day job is too much work, just find another source of income that works for you. Many male models are part-time waiters or bartenders. Though the male modeling industry is slightly less grueling than the female modeling industries, male models fall victim to the same problems that plague female models, such as having a low self-esteem, feeling deeply insecure, or worse, having an eating disorder. Here are some things to keep in mind as you try to stay healthy during your career as a male model:  Make sure you continue to eat healthily, get exercise, and remind yourself that you're a worthy person; don't let the modeling lifestyle get you down. Rejection is part of the game and if you're already prone to insecurity and self-loathing, then male modeling may not be the best path for you. Though part of the modeling lifestyle may require you to go to parties and schmooze with lots of people, don't become addicted to drugs or alcohol. Not only will this cause great pain for you mentally and physically, but it will have a negative effect on your physical appearance.

Summary:
Start looking for work. Stay professional. Keep your day job. Stay physically and mentally healthy.