Step One: See what law journals accept student works by looking at Submission of Law Student Articles for Publication
Step Two: Look at Washington & Lee Journal Rankings - you can search by subject area or look at rankings for general law reviews and journals. The law reviews and journals in the search results are linked, so you can look at their webpages.
Step Three: Consider submitting via Scholastica. You can submit to a large number of journals easily this way, but there is a small fee per journal you submit to. Check if your institution will cover the fee.
Presents quantifiable statistical data to determine the relative importance of journals within their subject categories. Does not contain all law reviews.
Journal Rankings Generally (not just law)