Scrivener's Error has some advice for new law students, which I largely agree with—particularly the "foundational course" advice, because boy do I regret not taking Federal Courts or Administrative Law, on the naive theory that, hey, I'm not clerking, I won't need them! Ummm, no. (I haven't yet missed taking Business Organizations or Bankruptcy, but I imagine it's only a matter of time.) I'd also add Wills, Trusts, and Estates to the list of things one should take, and give Evidence a bullet point all of its own just for emphasis—both fundamental, and I think they'd be hell to learn piecemeal or for the first time during bar review.
Two more pieces of advice: (1) Have something outside of law school and hang onto it, otherwise law school will eat your life, especially during your first year, which is Bad. (2) It's traditional to try and do way too much the first time that you're allowed to pick your own classes. It's probably a mistake everyone needs to make for themselves, but be aware of the tendency.