English, Math, Biology, Chemistry, Anatomy, Physiology, Pathophysiology, Statistics, Physics, Pharmacology, Psychology, Nutrition, Genetics, Human Lifespan Development...
Anything like that is helpful. You can take as much as possible and always find more to learn. One thing that is really important: sometimes pre-paramedics take pharm or A&P because they think it will help them the most as a paramedic. While those things are certainly helpful, make sure that you are solid in basic English and Math skills. A math mistake can kill a person quickly. Even with great iPhone apps for calculations, it only takes one serious mistake to ruin someone's life. As for English, well, you want to do well in school, interview well for a job, be well respected by your peers, gain the trust of your patients and write reports that stand up well in court, 10 years after you've forgotten about the event in question.
You'll only need about an 8th grade level in math and English...but you'll need to always be 100% at that level.