Law school may give you more than your poor bones could ever take

The number one skill for surviving law school is the ability to prioritize. It doesn't matter what they are teaching, every professor thinks that their class is the most important class in the history of the universe and should be prepared for it as such. This is impossible. If you try to treat each and every class the way professors wish you would, you will end up in the hospital with exhaustion long before you even begin to think about finals.
This isn't to say that you shouldn't put forth your best efforts. Quite the opposite (I can honestly say that I have worked harder in my first year of law school than my previous 23 years combined). You must, however, weigh the importance of your workload. For example, skipping multiple 3 and 4 hour classes to work on a paper for a 2 hour class is probably end up hurting you in the long run.
In summary, try to keep your eye on the big picture, leave time for your life outside of school, and accept the fact that it cannot all be done and that is okay.

Don't be that guy/girl

I have come to find out that I will one day leave law school with 3 things. One is, of course, a legal education. The second is a piece of paper that will allow me to sit for the bar (my diploma). The third and quite possibly most important is a reputation.

Ask anyone that went to law school who the biggest jerk was their first year and regardless of how long ago that was they'll be able to tell you (and if they can't there is a good chance it was them). I asked my dad when I started who was the token asshole in his class and it took him all of 2 seconds to spit out his name and what he is doing 25 years later.

Law school seems to present an environment where people's true colors shine vibrantly for all to see. However, what they don't realize is that the legal community really is quite small and there is such thing as law school karma. Word to the wise: don't hide books in the library, give your fellow studenst an incorrect reading assignment, or talk down to your classmates (or professors) because one day your dream job may come down to an interview with someone who has heard of you and your terrible ways.

Toto, I have the feeling we're not in undergrad anymore

I have now been in law school for one full semester and 3 days and although I expected it to be much different than undergrad this post is to inform you of the 3 biggest differences I have encountered thus far.
First, there is only one test. One, single academic challenge that determines your grade for the entire semester. Sounds stressful? You have no idea. The biggest mistake I made this past semester is not reviewing the material throughout the semester because I didn't have to. Trying to relearn things from the beginning of the semester when I had no idea what I was doing the week before the final was painful to say the least.
Second, you would think with the immense pressure that comes with having one grade deciding your entire grade in a class the professors would be kind and posts grades ASAP, right? Wrong. My grades started trickling back in about week before classes started again, with the last 2 being posted the evening before the first day of the semester. It was quite defeating to go the entire winter break and not be able to answer interested friends and family when they asked how I did my first semester. (I did pretty good, thank you for asking. In the curve or better in every class but one. I kind of choked in criminal law.)
Third, most law schools grade on a curve (I've been told Ivy League schools only do pass/fail, lucky bastards). My school curves on a B- scale. So the majority of the class gets a B- or C+, with only a handful of people getting A's. I'm pretty sure I haven't gotten a C since sophomore year of high school. Needless to say this is taking some getting used to.

Spending a month on the couch watching brain dead reality TV was fun but I have welcomed the start of my second semester and a fresh start to earn, what my dad likes to refer to as, pointy grades.