DS is 2. He sleeps all night in his cot (most of the time) but we still have to stay in the room whilst he goes sleep. No cuddling or anything, just lying on the floor next to his cot. It's not the end of the world or anything, but I'd rather not spend 30-40 minutes lying on the floor. Any tips on how we can move towards just leaving him to go to sleep by himself, without streaming him out too much?