I had three within the three years , and I'm afraid the years passed , and they won I was worse and worse at bedtimes, I have tried everything, and struggled! Even had them say my kids are tired on the school reports! I asked for HV advice and had tried all the suggestions, I would say keep going, it's the hardest child raising task I have had. Being consistent and starting the routene early to allow for problems. Eg early tea, bath, supper, milk, story/reading time and lights out. Mine do the I need a drink thing, so now I ask them to have water early on and tell them they are not coming back for more at all. Be firm they will push it further.
My boys sharing was an issue for me and still is! they are 12,10 and 9 and still run rings round me esp since devon was born, when I'm busy and distracted , they run amok!
The one thing I found was brilliant is book lights, I know she is only three , but for future and other mums , M&S book lights clip to back cover of book and encourage reading, they stay in bed!! they feel special as they are allowed to read past lights out time and then you can come up later and close the light / check its gone off.
One of my boys hates reading, but does it as this way he gets to stay up a bit more with light and is asleep in no time!