They have a couple old exams on the LSAT website.
http://www.lsac.org/
I took a practise one a while ago just to see what it was all about. I found the test really fun, it's really just a logic test, and who doesn't enjoy that? But I guess that's without all the pressure.
I've been thinking about going into law but I'm not sure if I'm ready to part with my soul yet. hmm...