Lack of sleep has got to be one of the hardest parts of having a newborn. Sleep deprivation can be brutal and lead to maternal (and paternal) stress and anxiety. Luckily both of our children were decent sleepers, although for some reason none of our babies liked sleeping in their bassinet and they really don't like sleeping on their backs. We resorted to some not-so-safe sleeping habits with our first baby. We'd let him sleep in the carseat, prop him…