How do you dicipline a 9 month old?

wow, I would let tell him NO. And when he is get temper when he doesn't get his way walk out of the room. See you can see him, but he can't see ya. Other then that I don't know what to tell you. Have you gotten any book to see what they say.

I have 6 children, my youngest being twins at 19mths and I can't say that I disiplined them at that age but I have maybe smacked their hand if they did something terrible enough but mostly just pointed my finger and told them no. Mine don't listen all that well either but as they get older I think it gets better. You can try the corner for a time out but I don't know how it would work with a nine month old

I'm not sure if you really can discipline a child that age because I'm not sure if they would understand.

Maybe not dicipline at that age, but conditioning works. Don't respond to his tempers, let him yell.

That's true, he won't understand the discipline. Sounds to me like he's just trying to express his independence. Babies really are selfish and want/need instant gratificaton, they just don't know any better. Mine's 11 months old, and we're starting the "no" concept. She'll crawl around and grab an electrical cord-to which I loudly say NO. She usually drops it, but will occasionally pick it back up while she's looking at me. They like to test lol. I guess if he starts pinching or being physical, you could put him in his playpen for a time out, but I really don't know if he'll grasp that as punishment, therefore not working. Probably best talking to your dr/pediatrician and see what they recommend for that age, that's a tough one. Good luck!!