Read something you enjoy. Study subjects you enjoy. For decades, law schools valued political science and criminal justice majors over other students, but the trend these days is shifting towards liberal arts degrees. Some of my friends at school are Neuroscience majors, some are Mechanical Engineering , Communications, History and English majors.
The modern attitude in law school admissions (at least where I’m sitting) values an educationally diverse student body over the cookie-cutter Political Science majors. Besides, on the first day of law school, the Political Science majors are just as useless as the Biology majors. Nothing you study in undergrad will provide any meaningful advantage in law school (except arguably Philosophy, but I’m far from impartial on that matter).
Talk to law students and lawyers about what schools they went to, and try to decide where you’d like to go, and what you want to focus on studying while you’re there.
I wish someone would have told me that law school isn’t about knowing all the cases, or even knowing lots of cases. It’s about overdeveloping your ability to analyze everything, and articulate yourself clearly. It’s not a trivia contest, it’s an arguing contest.