Generally, a good way to pass an EMT-B course is to do the following:
1. If possible, take an A&P course prior to the EMT.
2. Once you get it, read the book a bit ahead of the class, and make sure you understand it not just reading it and losing the info.
3. Familiarize yourself with the equipment and how it works so that on test day (or real life), you don't get stumped on how to use something.
4. Practice all of the hands on components, especially assessment. While you can pick up on some obvious things right off the bat (cyanosis, gross hemorrhage, obvious broken bones, etc), you can't get a complete picture without doing a proper assessment.
5. Last but not least, ABCs. When I took my basics course last year, there was someone who failed a practical day because they went to apply a traction splint before assuring a patent airway (if memory serves, the pt had several broken bones and possibly aspirated teeth secondary to trying to fly off of the roof while having quite a bit of ETOH on board