We can turn to US News to find out the year's top law schools, and Am Law or Vault for their lists of the best firms and companies. But were you ever curious about the relative ranking of law reviews and journals? This info can be especially good to know if you have a piece of your own that you'd like to get published, before you submit your work or accept an offer.
The law library at Washington and Lee University maintains Law Journals: Submissions and Ranking, which you can use to view the vital statistics of over 1600 legal periodicals. Set search parameters to include journal subject, country, number of citations in publications and court cases, how quickly articles are cited, journals' overall "impact factor," and more – you'll get a ranked listing of the journals that correspond to your query. If you're interested in a law journal's clout outside of the legal world, see Mikhail Koulikov's recent article, Indexing and Full-Text Coverage of Law Review Articles in Nonlegal Databases: An Initial Study, 102 Law Lib. J. 39 (2010) (Appendix A contains ranking charts).
For more information on law journals, scholarly legal writing, and getting your work published, see the GULL Guide to Publishing Articles in Law Reviews & Journals.