My problems were the result of my being disorganized.
Let things slip - neglect to do things
I have to admit that I sometimes still neglect to do things.
(Be/get) on top of things - do things on schedule, when they are supposed to be done; be in control of a situation instead of struggling with it.
I force myself to do things on time and keep chores under control.
Come to terms with - emotionally accept
It won't help your children accept their new lives.