The Center for Computer-Assisted Legal Instruction (CALI) provides online interactive tutorials on legal topics. Your Legal Research professor or law librarian at the reference desk can provide you with Mercer's access code so you can create your own password.
Law School Survival Manual: From LSAT to Bar Exam by Nancy Rapoport
Reserve KF283.R37 2010
Open Book: Succeeding on Exams from the First Day of Law School by Barry Friedman
Reserve KF283.F75 2011
Mercer Law professors may have their prior exams posted on their course web pages.