Sleep training techniques are methods used to help infants and young children learn to fall asleep independently. Common approaches include the Ferber Method, which involves letting the child cry for gradually increasing intervals before offering comfort, and the Chair Method, where a parent gradually moves further away from the child's crib each night until the child can sleep alone. Another popular technique is the No Tears Method, which focuses on comforting the child without letting them cry. This method encourages parents to soothe their child through gentle methods, such as patting or picking them up, to help them develop healthy sleep habits over time.