Begin your program by talking to your adviser and bringing in a copy of your transcripts and work history. Sometimes, previous classes and work experience can replace parts of the training program. However, just because you submitted your transcript when you applied doesn't mean the school will automatically count your old courses. Sit down with an adviser and go through each credit you earned in the past to see if any can transfer or replace current courses. Do the same with your work history.
Go to school full time, if you can. Medical transcription programs might be billed as programs you can do in your spare time and that can work around your schedule. However, this means you'll only take a couple of classes each semester, and it will take you longer to complete the program.
Ask to take extra credits whether or not you're in school full time. Typically, your advisers will ask you to follow a specific program and class schedule. However, if you are confident you can handle extra work, and you have time in your day-to-day schedule, taking additional courses can help you graduate earlier.
Study hard and often. If you have to retake a class because you didn't study hard enough to pass, this will add time to your overall program.
Explore your options for "testing out" of specific classes. Again, you must talk to your adviser about this. You'll pay a fee to take a test on the subject matter in a certain course, and if you pass, you simply pay for the credits that test covers. The more courses you can test out of, the sooner you'll graduate.