Law School Discussion

My current situation: Finished my 2nd year at a 4 year university, currently taking summer school and starting to study for the LSAT. Im a Psychology and Social Behavior major. I only need 3 more classes to finish my major, my general education classes are complete, but I am still stuck here for two more years because I entered the school with no units and am still 60 units away from graduating.
I know I dont want to take filler/bs/waste-of-time elective classes that will do nothing but boost my GPA, cause its a waste of money and time.
My question is, should I pick up another major? Such as political science, urban studies, criminology and law society ( something that is related to social sciences/social ecology) or should I just pick up a minor such as English or philosophy? Will I be able to write that I minored in something on my law school app and will it make a difference? I cant pick up a major and a minor or I will have to stay 5 years.
Your feedback is much appreciated!

I graduated from the University of California, Irvine with a BA in Psychology and Social Behavior. My overall GPA is a 3.5 and my LSAT score is a 166. The reason I am a splitter is because I was attempting to complete pre-med requirements during my first two years of college, and received very bad grades in a few core science/math classes; namely calculus ( which I failed TWICE (D and D-) before receiving an A the third time) and Genetics (which I received a C-, but a B+ the second time). Other than that, I received a few C+ and B- in classes for my major but mostly solid A's and B's with nothing lower than a B my junior and senior year.
I have not applied to law schools yet but am looking for recommendations for law schools that I have a DECENT chance to get into, and perhaps lower tier law schools that might offer scholarships, because I would gladly go to a lower tier law school if I can get some ( or all) of my tuition paid for.
Thanks in advance