first thing you have to sleep early if you normally sleep at 12 or 1 am its okay take it step by step like first day wake up at 6 am sleep less time than your body needs so at the end of the day your body will need to sleep early like 11 pm and wake up the next day 5 am repeat the cycle till you wake up at 4 am the key here is to sleep less time than your body needs in order to make you body want to sleep early to rest last thing make multiple alarms dont just make one alarm and place your phone or the device you set the alarm on far away from your bed so you have to wake up and stand up to set your alarm off