This is One Thing, a column with tips on how to live. Babies are so many things—cute and noisy and sweet. But most of all, they’re sleepy. I have a 12-week-old daughter and she’s still exhausted from ...

The first months are a swirl of snuggles and survival to get your baby to sleep. You may find yourself gently swinging a car seat on the living room rug or circling the block because motion knocks ...