My first class was contracts. She showed us a part of the paper chase, then went over the schedule and admin stuff. Since I went to a large undergrad institution, the class size of 75 didn't make any kind of impression.
The first week was busy. A fair amount of reading and getting used to briefing.
My first semester was kind of insane. Our school throws you 17 credits first semester and 13 second semester. First semester, I would get up in the morning, walk the dog, head to school, read or go to class, then spend time between classes in the library reading, break briefly for lunch, back to class, back to library, microwave dinner, class again and then home. At home, I would chill for a bit and walk the dog (someone else was around to walk him once before I got home) and then I would study some more. These ended up being about 13 hour days of school work. HOWEVER. Fridays I had no class. Fridays became my day to do little to no studying and then go to target/do some cooking/dog park. If I had a writing assignment due, I probably spent some of Friday working on that, but for the most part I kind of just took it off entirely, or worked at a more leisurely pace. First semester was about keeping my head above water and really became a scheduling game- those who are organized will have an easier time.
Second semester was way awesomer. I had time for workouts 3 days during the week since I didn't have to be at school until 11. 13 credits was way easier to manage and my second semester profs, for whatever reason, didn't seem to assign as much reading. I would go to class 4 days a week until 6. I had 7 hour breaks on Tues and 4 hour breaks on Thursday that I would spend in the library and could knock out almost all of my reading for the 3 classes that had it. I had time to work more diligently on my LRW assignments. And STILL had Fridays off (though that became more of a study and workout day). I could have dinners with my boyfriend and take the dog to the dogpark twice a week. Second semester I worked smarter and didn't have a drowning feeling and excelled in my classes.
Now I am working about 45 hours a week for a clinical at my school. It is amazing experience- I get to interview clients, write motions, go to court, head to prisons once a week- even though criminal law isn't my thing, I can't recommend this kind of experience enough. Plus I get credits which are paid for and a stipend to live off of. Luckily for me, it continues on into the school year. If I make law review, I will only take one class this fall and 3 in the Spring. If not, I'll take 2. Either way, it provides welcome relief from the grind of class and studying for finals.
I also recommend doing some student activities, or at least attending the social events hosted by your school. It's better when you're not in the boat alone. Take advantage of all the opportunities you have for success- if you don't do well, and you didn't exhaust all your study options (review sessions, individual help, etc.) you can't blame anyone but yourself. And the crappy curve. And try to have some fun- I am loving this. Of course, it's easy to love it this summer when I don't have to deal with a curve.

Oh and p.s. I did nothing prior to law school in terms of preparation other than read this site and Above the Law. And was happy I was fresh for it.