A couple of ideas...........Find your child's "currency", that thing or activity which is most important to him, and withhold that as punishment.
Time out can be effective too. Make the length of time appropriate for his age and be consistent. Do not talk to him if you have to take him back to the time out spot. People give up on time out because the child has to be returned to the spot. It can take a long time before he stays there.
Whatever method you pick do it every time and stay consistent and stay calm. Make sure he also is getting enough one on one time with you and your SO. That he is getting praise for the things he does right. And lots of hugs and kisses. Good luck!
at 5:46 PM on Oct. 16, 2010