Use of Checklists
It is estimated that as much as 70% of all accidents in which pilot error was a primary error could have been prevented with the use of checklists.
Checklists eliminate forgetfulness. Everything you need to know is on the checklist, and the stress of any situation—where normal or non-normal—cannot change what is on the checklist. A cockpit procedure is more likely to be completed safely by using a checklist than by relying solely on memory.