If you want to raise your child to be successful look at the mars-mellow experiment. Unlike IQ they could come up with a really strong correlation to school performance and later success and it seems (at least partially) to be something the family has some influence over.
I've read about it recently and found a snippet interesting that said the kids who could wait longer were better at distracting themselves with other stuff. Interesting because the initial thinking would be "discipline", but just teaching your kid discipline might not be the thing that helps them over the marshmallow challenge...
