If you don't want to feel groggy afterwards, you need to limit the duration. Here are seven questions and answers about the most important break of the day.

Forbes contributors publish independent expert analyses and insights. Nicole Serena Silver covers entrepreneurship and the future of work. Our minds are the most powerful tool that we can harness for ...

While doing a particularly boring task at work or home, have you ever stopped thinking about what you were doing, and started reminiscing about your last vacation or another event that made you happy?