Getting newborns to sleep through the night is a tricky business. My daughter had colic when she was a few weeks old, so putting her down to sleep was a challenging mountain to climb. What worked for her, surprisingly, was soft, gentle massage moves accompanied by slow, soothing music in the background. It helped relax her and settle her down enough to fall asleep.
For keeping them cozy, I swear by those thin, lightweight blankets made of muslin material. They're breathable and just enough to keep baby warm without overheating.
I also used a sleep sack swaddle - it provided the comfort of a tight wrap but was safe and easy to use. These, coupled with a consistent bedtime routine of bath, massage, and music, helped my little one sleep better at night.
That said, every baby is different. My son, for instance, needed white noise and lots of snuggliness to fall asleep. You'll eventually find what works for your little one - it's a process of elimination and patience!
Anyone else have some secrets to share?