wife went to AZ for 4 days so I knew it was my chance. First night I put him in his crib and let him cry it out. But I explained to him while I did it. Its bed time blah blah blah. Cried maybe 30 minutes then went to sleep. Next day started saying its bed time again and walking to his crib and he knew and started crying. I put him down and said I love you and he cried maybe 15 minutes. The 3rd day same routine. He cried until I closed the door in his room and instantly stopped because he knew it wasnt going to work. By the 4th day no crying at all.