Skin-to-skin contact is the most effective way to keep your baby warm. Hold your baby against your bare chest under a blanket for natural temperature regulation. Use the layering rule: dress your baby in one more thin layer than you would wear, along with a soft cap and socks. Check your baby’s chest or the back of their neck to ensure they are warm but not sweaty. Avoid using heavy blankets or quilts during sleep, and always place your baby on their back on a firm surface.