How to handle one's children?

There's a way says a wise old man
A way known to every child
Since the whole rigmarole began.

Do I bribe them? I begged him answer
Do I threaten or cajole or plead?
Do I brood? or spank their ass in rancor?
Said he frowning, "No indeed!"

How to handle one's children,
Mark me well, I will tell you now
The way to handle one's children
Is to

(to be finished when we figure out a suitable 
pair of last lines).

Yours, with apologies to Lerner and Loewe,
N.