Night wakings, what helped you?

My son (6 months next week) is currently waking up all the time during the second part of the night.

He goes down mostly around 7,30 and then sleeps until I go to bed (lol) around 10.30 when he starts crying, I feed him and then he sleeps until 2 AM when hell breaks loose and the starts waking up almost by the hour until 5 AM when he finally sleeps again until around 7.

Has anyone had the same experience and how did you solve it?

I plan to start sleep training but first I need to make him fall asleep without pacifier.