You could write this book. I know I could. Rotbart's advice isn't bad, but if you're dedicated enough to be contemplating buying this book on Amazon, believe me, you've though of these idea on your own.
Here's a sampling of what he recommends: eat dinner together, read bedtime stories to your kids, have a family movie night, help them with their homework, have them help out in the kitchen, go to the library together. Lovely ideas, all of them, but I'm guessing these are things that you're already doing or trying to do.
Then there are the ideas that seem slightly overprotective or obsessive. He recommends against family pets because the parents will end up taking care of them and that robs them of time they could be spending with their child. He also recommends against sleep away camps because then you have to go several days without tucking them into bed. He likes the idea of sleepovers, but he thinks you should always host them and to that end you should make sure that your house has the best snacks and pancake breakfasts.
Bottom line: check it out of the library if you're curious, but don't buy it.