When operating in and around the aircraft there are many things that you need to be sure of. If you're anything like me, then you understand the somewhat hermit crab type memory. When lifting- specifically in the civilian HEMS setting there is always a pre-take off confirmation. That checklist may look a little like this.
Crew: Flight Release Pilot: Check
Crew: Shore Power Pilot: Disconnected
Crew: Engine Switches Pilot: 2 To flyCautions/Warnings/Rotor Pilot: No Cautions, No Warnings, Normal 2 Advisories, Rotor 100%
Crew: Fuel Pilot: 2 plus 10
Crew: Autopilot Pilot: On
Crew: Flight Controls Pilot: Unlocked
Crew: Seats- Belts- and Doors Pilot: Check, and Crew Check
Crew: Risk Assessment Pilot: 15 (Some kind of number usually ranging from 5-30)
This is just an option of what lists exist, but it is a good starting point to get a glimpse at what is reviewed.