Which Planet Law school book? The first or the second edition?
Ditto on that warranty. I would even suggest a "tough box" those laptops that can be dropped, spilled on etc.(Although I have no idea how much those costs). My laptop starting messing up right as the warranty expired. Make sure you have a good laptop, you'll want it.
This is totally going to start a "what type of laptop is the best" war, but you haaaaaave to get an IBM laptop with a three year warranty (make sure it lasts until law school is OVER). Then you have to get an external hard drive and back up at least once a semester. I set up a gmail account that I don't use for regular emailing, but I email myself outlines while I work on them because you can NEVER trust the hardware.
If you are going to read the pre-law prep books, read the section on how to not be hated by your fellow students -- don't argue with a professor just to prove you are right, do not hijack discussions in class, etc.