All aspirant models should firstly get a good compilation of photographs together taken by a Independent Professional Photographer. Find a good model agency to join. A modeling agency that has been in business for atleast 5 years.
Depending on the type of contract a agency offer, models should generally opt for a Non-exclusive contract with a period not exceeding 3 years. With this type of contract models are often allowed to contract work through other agencies thereby increasing their chances of securing more work.
Models should also not expect to join an agency and wait for fame to come knocking. Know that the modeling and casting industry is hard to crack and often assignments are seasonally or short term in nature.
Models should take the initiative to join at least 2 agencies or more and this increases your chances.
Lastly models should keep their finger on the pulse of the industry by staying informed of open auditions and castings in the media.