For those of you that are looking to brush up on a few skills prior to starting the MBA program, GMAC's Essential Prep Collection may be a good option. The entire collection comes with tutorials in Accounting, Finance, Quantitative Skills and Statistics and gives you access to online materials for an entire year. If you don't need the whole collection, you can just purchase the tutorial that you need most.
Other suggestions for getting MBA-ready?
*Read the Wall Street Journal
*Familiarize yourself with Microsoft Excel and other Microsoft Office products
*Read Accounting for Dummies or any other book that will introduce you to business terminology
*Enroll in undergraduate classes such as Statistics 1430 or Accounting 2300 prior to enrolling in MBA level courses.