Art DeVany proposes some mechanisms by which fasting may increase mental clarity
Robb Wolf looks at two seemingly contradictory studies on IF (also discussed here)
Marc discusses his approach
One of Art DeVany's readers explains his approach
For my eating, I like to visualize myself in a wild environment. What would I eat if I were trying to survive outdoors?
I am personally fasting about twice a week for 24 hours e.g. from 1pm one day to 1pm the next, as explained in the book Eat Stop Eat.