Want to be more productive? Focus on happiness.

So procrastination is a mood-management technique, albeit (like eating or taking drugs) a shortsighted one. But we're most prone to it when we think it will actually help… Well, far and away the most procrastination occurred among the bad-mood students who believed their mood could be changed and who had access to fun distractions. This group spent nearly 14 of their 15 minutes of prep time goofing off! Students who believed their bad mood was frozen (those who were not given a supposedly mood-lifting candle) spent less than 6 minutes goofing off. (Even the good-mood students procrastinated slightly more if they believed their mood could be altered.)

At least one study of blocked writers has found that they were more productive and more creative when they were essentially forced to write instead of scribbling only when the mood struck them.

Focus on emotions. Knowing something isn't enough to cause change. Make people (or yourself) feel something.

…doctors put in a positive mood before making a diagnosis show almost three times more intelligence and creativity than doctors in a neutral state, and they make accurate diagnoses 19 percent faster. Optimistic salespeople outsell their pessimistic counterparts by 56 percent. Students primed to feel happy before taking math achievement tests far outperform their neutral peers. It turns out that our brains are literally hardwired to perform at their best not when they are negative or even neutral, but when they are positive.