There are many habits I’ve gained while working from home: snacking when desired, taking the dog for a midmorning walk, talking to myself and settling in for a daily nap. That last one will be especially painful to give up if or when I return to an office; my naps have become essential afternoon pick-me-ups. Why do my naps feel so needed and so revitalizing? And will I have to live without? I spoke to experts to get their advice.