If you were planning to go BBA ---> MBA with no work experience, you would not get as much out of it and employers, correctly, understand that it isn't nearly as valuable as a guy with experience doing it. If, however, you have the ability (and desire) to get a master degree in a non-business field (say IT related), you can up your stock by proving yourself academically and gaining a more diverse skill set. If you could co-op while getting that masters, all the better. Certain people will also say don't get your graduate degree at the same place as your undergrad, but I don't put much merit in that because I did and it has worked out great.
That being said, and this might be the most depressing(or uplifting) part of the sermon: most of your success will depend on your ability, drive, initiative, work ethic, discipline, ability to get along with others and amount of personal responsibility you take. Sorry for the digression. Old guys have a hard time stepping AROUND soap boxes...