Eat Little White Flour

Don't eat much white flour. It pumps the blood full of glucose too quickly, and it leaves the bowels too slowly. It doesn't take long to acquire the taste for whole grains.

Kill Your Television

Or at least wound it. There are a great number of reasons to not watch more than an hour or so of television per day, especially for children. Kids who watch more TV have higher blood pressure, lower vocabularies (though that may be due to just less intelligent and less engaging parents also being the ones who put their kids in front of the TV more), obesity, aggression, sleep disruption, and so on. Seriously, if you've got kids, be a good parent and ditch the television.

Even for adults, besides the obesity and sleep disruption, wouldn't it be better to use that time to actively do something? Learn something. Make something. Exercise. Have a positive interaction with another person. Please. Relationships are the most important part of our lives. Be healthy.