For any job, not just photography, you need evidence that you can do the task. For most roles this would be in the form of a CV, but in this case, you will need a strong and varied portfolio that you can show, plus maybe a CD you can leave behind (watermarked obviously).
Other than that, you would do well to show any potential employer that you have what it takes to go out and get work for them as well, so document any work you have done, and how much money you earned out of it.
You'll be the new boy on the block, so be prepared to start with lower than you want wages, even for 3 months, to get some real life, hands on experience that you can take elsewhere at a later stage.
It's dog eat dog out there, decide what you want to be doing in 3-5 years and then plan how to get there. Demonstrating a good "Personal Development Plan" to a future employer shows commitment, and that you have a thinking head on your shoulders.
I have been out of work for a few months, luckily I was paid off so I could afford to choose what and where I went next. I have a photographic goal in mind, but right now I'm going back to direct sales, as it's where I can make the most money to finance my future plans.
Have a plan, stick to it and go for it.... Good luck
Steve