Others prefer a more old-fashioned method like keeping everything written down and in a safe.

FORBES: Is Lack of Planning Putting Your Family in Danger?

Because most people read words more quickly than they can identify and name colours, this widely used method tests their ability to inhibit the urge to read what is written and instead focus on the task of naming the colour.

ECONOMIST: Cognitive disenhancement

Using a bottom-up approach to his research, as opposed to Mr McCullough's top-down method of looking at the project through a geopolitical prism, Mr Parker has written the Panama story for a new generation.

ECONOMIST: The Panama Canal

Justice Minister David Ford has written to the Justice Committee to outline what progress has been made in finding "an effective and less intrusive method other than full-body searching for prisoners leaving and entering prison".

BBC: Date set for body scanner trials for NI prisons