What is "Lean"?

I am an engineer and I have worked in manufacturing for the last 10 years. Through those experiences, I have implemented lean manufacturing using waste reduction, six sigma and process improvement tools.

So now I have a newborn and I am in desperate need of streamlining and simplifying my everyday home life. Can I re-apply the principles of waste reduction and process improvement to my daily life?

I know, it sounds nerdy, but, hey, I am an engineer.

Let's get organized!