Simple Answer: Be Ready to work for free. Don’t think that on your first job, you’ll make lots of money because that is just not happening. When you start, you start at the lowest position and you have to make your way up, but even before that, you need to build up a resume and what you need in it are credits (aka Experience). You only have one option, working for free,  but you have to see it as Working for Credits.

• It’s not about your grades
  People don’t judge you from your grades in film school, they don’t even care about them, they judge you from the credits you have because credits means experience and experience is what gets you hired. With experience also comes contacts, so you’re not only working for credits but you’re working on building a network of people that may decide to keep in touch with you and even find you work.
• But I have to make money
  You are going to say that life is expansive and you need money to live and I totally agree. But the reality is that you’re not the only person trying to get a job and if you have 5 credits and the other one has 15, it means that theoretically, this person had a lot more experience than you. So yes living is expansive, but if you’re serious about wanting to get inside the industry you’ll have to do this.
• It will pay off
  You’ll end up spending days on set without getting paid to later see many of the people you’ve met on set are calling you back for other jobs, sometimes including money, and it goes on and on. At one point, you might even meet someone who will be able to keep you around and find you work. But if you aren’t there, what are the chances of this happening, versus you being there?

So now that you’re done, get out there, go on Cragislist and find anything to work on. The more you do the more it will help you later on.