Atomic Habits by James clear is one of those books that provide a clear execution framework to a vague but useful theory. The best way to start the book is to first note down a set of new good habits that you want to form and a set of bad habits that you want to break and then take the notes to formulate a strategy for each habit to benefit from different tools for practical execution available throughout the book.
I am not summarising the book since you can get a complete a cheat-sheet at https://atomichabits.com/cheatsheet
Also, there is one specific additional reading on the atomic habits that you must go through if you are a parent at https://atomichabits.com/parenting