How Not to Get a Baby to Sleep

I should have mentioned this in the earlier posting but neither of our kids are good sleepers. Our four-year old just started sleeping through the night when her brother was born. One of the problems is that my wife holds him until he falls asleep at night. Every baby books says not to do this but since she's away from them all day, she does it anyway. Part of me understand but the other part has to deal with no sleep now (and possibly a lifetime of bad sleep habits for them).

Only 13 or 14 years and they'll be out all night wrecking the car.