If you are serious about finding a job, treat the search like a job itself. Volunteer work is fantastic, getting paid is even better, there's nothing like getting your own money. For experience sake, there's no reason why you can't volunteer, work, and go to school. It will get you out of the house,around other people, and you migh just enjoy it.
Make a schedule for yourself that every day, barring classes or homework, you will look at the paper for 1 hour and make at least 3 - 5 phone calls. This one is going to sound silly, but when you make the phone calls, sit up straight, smile, and be dressed appropriately, it makes a difference in your voice.
Princeton Review has an interesting quiz that helps decide where your career interests might be.
http://www.princetonreview.com/cte/q...reer_quiz1.asp
Then based on your interests (you have to sign up, I think to get the offical results) it will give you a list of potential career choices. (It thinks I am in the right career, but some of the alternatives I have considered, so I'd guess it's pretty accurate)