I believe in keeping momentum, but I also believe in the power of power naps. They are soothing, restorative, and good for the soul. They are a small indulgence in a world full of trials and effort. Overdone, they result in grogginess and difficulty rousting again, but closing my eyes for a half an hour or less is often just the thing to get me jockeyed for the next adventure of my day.
It's a respite and a cozy quietude. Add some goose down to cover me light and warm, and a short nap is positively heaven on earth. I awaken bright-eyed and renewed.
If I am dragging and sleepy, I stop everything and take ten minutes to close my eyes. It's a mini-vacation from the challenges of my day, and the best kind of soul food.