New parent classes go on about breastfeeding and growth. All important stuff. But there's one huge parenting thing that they all leave out:
Throwing stuff away.
Children generate and accumulate so much crap. So, so much.
And as parents we're wracked with such guilt throwing any of it away - whether it's a finger drawing from nursery or a crappy Happy Meal toy.
Teach us to throw stuff away and you'll change our lives.