Birthday suit
Dress up like you're ready for business! Wear lots of gear on your belt; pocket mask, trauma sheers, CAT tourniquet, stethoscope, flashlight(s) and glove pouch! That's important you realize 95% of fire dept calls are for EMS, so all that swag is key to success. If you have anything fire related, wear that too. Show them you're going balls-to-the-wall 110% and ready to battle a flash over at any moment.
If you realllllly want to out do everyone else, and get an automatic A, you should get a tattoo of a Maltese Cross or other FD related stuff on your arm the day before class and wear a cut off shirt. You may even get to sit in a Lay-Z-Boy recliner during lecture for that.
I recommend everyone here google image search "firefighter tattoo"
The images are absolutely priceless.