Sleep training is a popular method used by parents to help their babies develop healthy sleep habits. Some common techniques include the Ferber method, the extinction method, and the chair method. The Ferber method involves gradually increasing the amount of time you wait before comforting your baby, helping them learn to self-soothe. The extinction method, also known as "cry it out," involves leaving your baby to cry until they fall asleep without any intervention. The chair method involves sitting next to your baby's crib until they fall asleep and gradually moving the chair further away over time. These techniques may vary in intensity and duration, so it's important to choose a method that aligns with your parenting style and your baby's needs. Remember, consistency is key when it comes to sleep training, and it may take some time for your baby to adjust.