My parenting vocabulary is quite limited, and Google Translate can help that much. Hope you understand me anyway.
Our son had colic for four months, he is ten months now. The colic resulted in bad sleeping habits. Well. He sleeps well when he finally goes to sleep. But getting him there is a challenge.
The thing is that he is quite active when he is awake and everything seems to be game to him. Sleeping is no fun according to him.
We've tried to put him in his bed when he is almost asleep, but it's like letting a bomb go off. He is suddenly 100% away and starts playing in his bed.
What we do is to go and rock (might not be the proper verb) him until he fell asleep. It can take from five minutes to an hour, which can be quite frustrating.
I used a middle approach. The last two times I've got our son to sleep in five minutes.
He is old enough to stand in his cradle, which made it hard to just put him down and go out from the room. What he did was to just stand and wait, and then stand and scream/cry. He can do that for a long time and as I tired parent I gave up.
We have always used the same routine every night (and almost the same time every day) and that didn't help much.
What we do now is to just sit next to the cradle with him in our lap. He can mess about all he want as long as he is lying in our lap. We do not talk or look at him. If he tries to stand or do something, we just lay him down again. It works much better than trying to mess with him in the cradle. And it works every time. First week took about an hour each time, so five minutes feels like a victory :)