As summer is upon us, what does psychological research tell us about how we spend our leisure time? The answers could provide for a more enjoyable vacation in the coming months. "Even asking the question of how to 'optimize' a vacation seems fundamentally un-vacation-like. And yet people constantly puzzle over how to get the most out of their valuable time off: poring over guidebooks, checking the forecast, looking up online reviews of hotels and restaurants, arguing with spouses over where to go and what to do, and when. The problem, say some social scientists, is that people do all this — and spend thousands of dollars — with an incomplete understanding of what qualities make an experience enjoyable."