If you want to enter modeling, then what you do is to enter modeling related activities so you will be noticed by potential talent agents and casters. Modeling is a word of mouth thing. It is also visual. You should have a lot of nice pictures online so you will be noticed.
I will have a fashion show this October 2012. It's hitting 3 birds in one stone. You get to have your own model portfolio, you get the opportunity to have a ramp walk and you will have own face on a magazine.