anyone has problem with toddler's sleep? my son 3 y.o. doesn't want to sleep. Make me awake until 3 am or 4 am almost every day!

Lesser long afternoon nap. No sweet foods 2 hours before bed time, dim or off all lights at home, restrict up to maybe 3 books then proceed to bed. Schedule this as routine, follow strictly for 2 weeks, it should help!