Our second was the worst sleeper. If we had him first i would not have had a second. For almost 2 years, i didn't sleep more then a hour at a time. We tried everything(cry it out method when you go back in increasing intervals, basinet in our bedroom, co sleeping, etc..), and one night i had enough when baby mama was working i put him to sleep in his crib went to sleep and i was so sleep deprived/didn't care, i slept slept through most of his crying and just let him kept going. After that he slept great. So all it took was for letting him to scream at the top of his lungs all night.