How Do You Get Grade-Schoolers Back to Sleep?

My daughter struggled with sleeping until she finally slept through the night for the first time at about four years old, shortly after we moved into Chateau Travolta. That whole period of zero-sleeping through the night is a giant haze and something I like to avoid thinking about, except to note she was cute and sweet even though she never slept.

Then she turned into this awesome sleeper who could sleep through military helicopters flying over the house and fireworks set off next door and ki...