The Single Unified Theory of Parenting

This is a very simple but extremely effective theory. Its core concept is "boundaries". In other words, the parent sets boundaries to his child that are:
1-Simple
2-Crystal clear
3-Non negotiable
4-Continuously enforced

Examples of boundaries:
Eating- Where: sitting on a chair from a table. How: using fork and knife. When: On specific times. NOT: lying on the sofa, floor, watching TV, using fingers and whenever they feel like it
Playing- Where: certain playing areas of the house. How: put toys back to where they are usually stored. When: During playtime. NOT: Wherever they want in the house, whenever they want, and leaving everything scattered on the floor after they finish
Sleeping- Where: in their own bedroom. How: with the parent helping the child to fall asleep for 10-15 minutes. When: At specific time at night. NOT: Sleeping in his parent bed, whenever they want, watching TV
Same principles apply with studying, sleep overs, watching TV etc.
It's hard at the beginning but then its a breeze. Trust me it works. Of course, the younger the child the easier this theory is accepted, however, its never too late.

Off to the beach with my grandson today to continue the mentoring of the Kenny Rogers theory summarised in his epic (!) song The Gambler:
"... if youre gonna play the game, boy, ya gotta learn to play it right.
You got to know when to hold em, know when to fold em..."