It’s not the amount of time you spend that matters. It’s how you use it. The best chess players don’t necessarily spend the most hours practicing. According to a 2005 study, the best of the best spend the most amount of time engaged in serious study, writes The New York Times’s Tim Herrera. The same applies to the non-chess players among us. A 2012 study demonstrated the importance of “structured reflection” in leadership development. “Meaning: Spend more conscious hours and effort in genuine introspection and self-examination, and fewer hours … ahem, goofing around on Twitter,” Herrera wrote. • Do you think you ‘work smart’?