This chart & accompanying list [PDF] — "Choosing The Right Law Firm For You" & "Considerations For Evaluating A Job Offer" — come from the NYU School of Law.
Obviously intended for law school grads, I think this set of tools would also help paralegals & other legal staff in making career decisions.
Found this gem in a post on the Counsel to Counsel blog; worth a look for more than just this info!