At this point, the most important thing to do is to complete your education as inexpensively as possible and get a job. I'm also a teacher, so I can give good advice on this subject:
Someone commented that it's all about who you know /networking. This is true. Almost everyone who is hired at my school is either 1) a student teacher who's just finished up training with us (or with another school in the area who doesn't have an appropriate opening), OR is a substitute teacher. The administration LOVES to hire from these two sources because it means they've had a chance to "try before they buy". They've seen you in action: they know whether you "have it" or not.
So, keeping that in mind, when you reach your student teaching semester, push your university supervisor hard to put you in the school you really want. Be polite but insistent that you've visited _____ school and would strongly prefer a placement in that location. Contact your cooperating teacher early, ask for books to take home over the summer, ask what you can do to "get ahead" for your student teaching year, dress professionally when you go to meet him or her.
It goes without saying that you MUST have an A+ in student teaching and excellent recommendations from your cooperating teacher.
As your student teaching semester ends, ask your cooperating teacher's help in getting the principal, the department head, and anyone else who seems appropriate to come observe you teaching. You want the principal to be aware of you. If he doesn't have an opening in his own school, he will be able to "talk you up" to his fellow principals.
Become qualified to sub (that usually just means passing a drug test and a criminal background check) when you begin student teaching. As your student teaching experience comes to an end, let the teachers in your department know that you're available to sub for the rest of the year. Typically you'll pick up some jobs as teachers take days off for their own kids' end-of-the-year activities, etc. And every day you're in the school is a job interview. I remember one student teacher who was actually hired to finish out the year for a teacher who'd left unexpectedly . . . and she was so stupid that she failed to realize she was "up for the job" the next year. She showed up in sweat pants, let the kids run wild. She ended up being fired from the sub job, and I don't know if she ever did get a real job.
Finally, you need to offer something extra to the school; that is, something other than just your teaching degree. I remember sitting in a college lecture hall, and my professor saying to a room full of student teachers, "Remember that your degree will never get you a job." Huh? What? Why did I just go to school? He went on to explain that every other person applying for your job has the very same degree . . . so why should they choose you? Can you coach a sport? That's the #1 way to be hired. Are you qualified to teach an unusual subject? Or are you dual-certified? Are you bi-lingual? You need something other than that brand-new degree.