Good report writing comes with practice. As for trauma injuries, this is how I write it ie: dcap-btls noted in left arm and left leg, no other dcap-btls noted.
I write very detailed reports and its gotten me into trouble. So over time, I have adjusted my report writing so that the chief complaint is there, how the patient presents,my assessment,how I get them to the stretcher, vital signs,interventions, how the patient responds to said intervention, what my findings are, radio report noted, med control orders, transfer of care to ED staff.
All the pertinent information is in my report, but I've pared it down to a paragraph or 2, depending on the call.