Training Baby to SLEEP through the night?

When my son was born, he had his days mix up with nights. He slept all day, the heavy sleeper would sleep through vacuum noise, dishes, TV, you name it. But the nights were horrible for me. He would wake up every 1 to 2 hours, sleep deprived and desperate I researched and researched for a solution or a miracle. At 3 months, he was waking every 3 hours, at 4 months every 4 hours, and by 9 months he woke up only once.

Things that worked:

• Exposing baby to the light during the day to keep him awake. Opening the window shades and letting the sun light up the house.
• Taking baby out, shopping, walking, playing on the grass.
• Playing with baby.
• Filling up baby's tummy before bed
• Swaddling
• rocking
  
• prolonging feeding when baby wakes up at night by changing baby first, rocking baby,
• Sound Machine
• Bath at night
  
• Prolong night feedings by 30 minutes. How? Giving baby water instead of milk to help prolong him from wanting formula at night.
• Watch "Happiest Baby on the Block" video

Things that didn't work for us:

• Crying it out method
• Cereal in the bottle
• swing
• bouncer
• wetting baby's forehead