At its essence, willpower is the ability to resist short-term temptations in order to meet long-term goals. And there are good reasons to do so. University of Pennsylvania psychologists Angela Duckworth, PhD, and Martin Seligman, PhD, explored self-control in eighth-graders over the course of the school year. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.