I still use what I learned in the class and my first ems company. SOAP Subjective, Objective, Assessment, Plan and I write my report in that order. Essentially just write what the PT and bystanders told you, what you saw and did, a few possibilities that need to be ruled out such as CHF in a chest PX call and then I just write every intervention that I performed (plan) during the call such as administering O2 with NC or NRB. So pretty much just what the guy above me said, keep it simple. You would not believe how simple some EMTs i've seen write their reports, it made me think it was always extremely quick and easy but you just gotta work at it and you get faster and faster writing these reports. I started out taking more than 10mins to write a full report, after a while I could get one done in 4-5mins, the city will force you to get better and faster because I can still remember my FTO telling me we had 911 calls waiting in our area and freaked out and wrote like a damn tornado.