Definetly get some internships in there somewhere. I don't think schools really care where you interned or what you did, as long as your internships show that you are a well-rounded and responsible person. For example, I had two internships during my UG, one at a senator's regional office, and the other for the county's probation department all while working PT and going to school. Although they were not law firms or DA offices, they will get the job done on my application, if you know what I mean. Bottom line is, get some community service or internships in there somewhere. If you can't find a law type position, find an internship someplace else. Definetly utilize the free time you have now before its too late.
As for looking for internships, my UG's career services center had internships posted. I got my internships through my politcal science department, and you received credit for doing it. The internships ranged from public service to law enforcement to the D.A.'s office. All you had to do was fill out a form and the department took care of the rest. You intern for 6-10 hours a week, and at the end of the term you write a paper and you get units. It was a great deal and easy as cake. Check out the career center at your UG, and maybe the poli sci department and/or your own major department. Good luck!