we have 3, 2 in their own rooms and baby with us. I read a story to each in their bed they get a kiss and cuddle and we say our "prayer" for lack of a different word. then take the baby to her cot ( she sleeps side car) and she has her own story, bottle and eventually sleep. sometimes others appear in the bed. as long as they are quiet that's kinda ok (schools started so they are clingy ) and I put them into their bed when they are asleep.
next week we'll start our star charts again. sleep with out fuss, is a star.
it takes time to build the concept and then sticking to your guns but its great to not get kicked too much during the night.
side car cot is great as it gives space but easy access for everybody- we took one side of bars off and put that side next to the bed. you can have 1beside the bed and 1at the end of the bed to start and slowly move the bed away from the end then into another room.
we make it about the kids having their own space. cause they gotta share everything else.