I don't mean timeouts, but being stern and saying "no" to discourage certain behaviour? LO is 8.5 months and i have been being firm in my no's (no smiling even though i am dying to!) when she starts to est domething dirty or crawl over to an area i want her to stay away from. i know she is too young to fully understand, and she doesn't always listen to me, but is it too early to start?

When did you start?