Research from Harvard shows when people's minds drifted from the task or activity at hand, they reported being less happy than when they were fully engaged in whatever they were doing.
Researchers discovered that cognitive wandering comes at a cost and said when people think about something other than what they're doing, they feel less happy.
Generally, people reported being the happiest when making love, exercising or conversing. The study found people are unhappiest when resting or sleeping, working or using a home computer.
