Pilots use it; some doctors use it.  The benefits of its use have been documented.  What is it? A simple checklist. Are you taking advantage of it? 

My sister and her husband are pilots. Each time I fly with them they pull out their pre-flight checklist.  Even with hours of experience, they use a checklist.  Why would experienced pilots who have initiated flights hundreds of times, still use a checklist? They know that for complicated activities, the brain needs support be to accurate.  Look at these research results.