RE: College Major - I don't think college major matters much when applying for schools unless you are applying for a specialty program. If you know you'd like to focus on international human rights, spend time in undergrad taking courses on social geography and history. If you think you might want to be a patent attorney, major in engineering. If you think you'd like to practice in the tech world, consider majoring in computer science or a related field. I personally think your college major should be something you're passionate about and related to a field you might want to practice in, rather than pre-law.
RE: Taking the LSATs - consider taking some philosophy and/or logic classes in college. The LSATs test a particular way of thinking, so experience with pushing yourself to think analytically and work on your logic experience would be helpful.
RE: Choosing a law school - focus on both specialties (e.g. a strong environmental program if you're interested in environmental law or a strong judicial clerkship program if you're interested in practicing in a courtroom setting) and location (where you might want to end up) when looking at schools. Certain schools may have requirements about whether you can seek employment your first year, or attend part time, so consider your lifestyle while attending.