Show your kids some good old comedy!
The Dubliners used to sing "Give your child a jar of the porter" - but even better, give them some REAL old comedy to laugh instead of that trash that Nickelodeon 'feeds' them with every day, those so-called 'teen comedy serials' like "Bucket and Skinner", "How to Rock", "iCarly" a.s.o., where 18- and 20-year olds behave like babies in a nursery school, shrieking hysterically, running around like half-wits, but at the same time playing it 'cool' and 'mean' and intriguing just like they do in the soap operas made for bored housewives - believe it or not, that stuff is literally poisoning their minds!
My own 13-year old daughter was JUST beginning to behave somewhat seriously and logically - until she 'discovered' that daily nonsense; and now she's developing back into a spoiled 3-year old... I think the only 'antidote' is to make them familiar with some of the good old comedy, no matter if it's simple slapstick with Laurel&Hardy, Harold Lloyd and Charlie Chaplin (the only one she's responding to, fortunately - because besides the laughs, there's also a social and human message behind it!), crazy screwball comedies from the 30s, or the all-American humor of Doris Day, Lucy Ball and Jerry Lewis.
Because this kind of comedy still was INNOCENT, and today's 'comedies' are taking away our children's innocence: they laugh when everybody's mean and nasty to each other, when teenagers think of themselves as the kings of the world, when the only 'important' issues are what to wear and how to make parties and how to behave impossible at school and to ridicule your so-called 'friends' - kids want to laugh, they NEED to laugh; but let's make sure that they laugh about something that doesn't destroy their character!!
Let's be realists, let's demand the impossible.