Study is all I can think of.
From my test, a lot of the question were which treatment is the highest priority. The way I thought of it was always in the ABC order. That usually helped. Also knowing what signs constitute an immediate life threat when you come across them during your head to toe. Knowing to stop and immediately treat those.
Other than that, just go through all your basics. Signs and symptoms of shock, cardiac, allergic reactions, spinal injury, internal bleeding, breathing emergencies. Know you BPs, heart rates, skin color, and mental status for each (for early onset and full blown symptoms).
Know all your procedures for airway. What to do if it's blocked. When to put in an oral vs. nasal, or a non-rebreather. Know the perfusion rates for each and the L/min of oxygen you use for each one. When to suction and how.
Alright, that's all I can think of off the top of my head. Good luck to you. The fact that your giving it another try already tells a lot about you. I'm sure you'll do great!