This was one of those "ahhhh I'm not alone" posts. My 'just turned 3' little boy is often my biggest challenge as well. He's a screamer...happy, sad, mad....he's just LOUD about everything & like yourself, I have tried everything it seems. It's so weird too because the rest of us are such quiet people?! Fortunately in every other area he's a really great kid but man does he make my hears hurt! I did have a problem at first, with him being the baby of our family he didn't know his own strength (wrestles with older brothers); but with reinforcement of being gentle & "hands to self" & some time in the time out chair he actually got over this pretty quickly. One thing you may try is a 'safe zone'. An area that kids can go alone for some quiet time alone (mine is a little tent that I use as a book nook), or, as Reggio uses; a hula hoop to define personal space. Best of luck to you! I just keep saying to myself "this too shall pass".