@stephli: Law schools will probably never ever see your transcripts. They get a grade report from LSAC and what they care about is the cumulative GPA. Some employers request undergrad transcripts, so I wouldn’t go too crazy with the P/F classes, but you shouldn’t be concerned about taking a few. No one cares about your recommendation letters.
College is also a really good time to do some interning in law offices. The practice of law often differs significantly from what most expect and you don’t want to learn that only after law school.