Einstein slept around 10 hours a day and took his rest seriously. He believed that good sleep was essential for both physical health and mental clarity. What made his routine unusual was his habit of taking short naps during the day, sometimes more than once. These naps only lasted a few minutes, but he found them incredibly refreshing. He believed these brief moments of rest helped reset his thinking and gave him a fresh perspective. For him, stepping away from a problem, even briefly, often made it easier to return with clearer and more creative ideas.