Structure = Simple

One of the toughest parts after a divorce is moving to a new "normal" with regard to your children living at two houses.  Everything is different, and will be an adjustment for everyone.  After the initial process of getting settled in, the kids will notice the different parenting styles and expectations at each house.

I received excellent advice on this topic.

One of the differences between myself and my ex-wife was clearly in the department of discipline.  Not punishment, but rather, structure and how a home should run.  These differences came to light rather quickly, and was reflected in the behavior of the kids.

Mom was much more lenient (read: fun) while dad developed a routine (read: not fun).  But I was encouraged to establish this quickly, and stick to it, and the payoff would be soon, and easy.
Well, it did not start out easy when the kids resisted, or made comments about staying up later at mom's.  Sometime's even lamenting it was  better over there.  That hurts, right?  I'm here to convince you to stay the course - it will be worth it.

The truth is, kids crave structure and routine (despite what they say).  It gives them security and comfort knowing what to expect.  They will be calmer and sleep better.  Soon they know it is time to get into pajamas, brush teeth, etc. If clothes are always picked out the night before, mornings are peaceful and easy.

This is where you want to be.  Well-rested kids who know what the household expectations are.  Resist the temptation to let them stay up late (you're feeling guilty, but guilt is for something you have done wrong - not applicable here).

It was not long before my house was running like a well-oiled machine.  Interestingly enough, I would hear about all the morning chaos at mom's, or all the drama about going to bed at night.  The ex-wife chose no structure, and had problems.  And miraculously, at my house, there was none of that.  Same kids - totally different behavior because of the environment.

I think you intrinsically know this.  I did deep down too, but I needed the repeated encouragement to stay on track.  So, stay on track!  A little effort now will avoid long-term friction.