Cut Ur rate of speaking by half.....And also as u told use Ur emotions to control Ur voice,thats really vital ,for overcoming stammer....Using swear words by far is known as the best way of becoming more aggressive,gives u a huge confidence boost thereby overcoming stammer......And also u gotta push urself,i.e go talk to a girl,hell....Even flirt with her or join a random group of friends at school and yell rubbish which makes no sense...This removes fear of stammer for the most part,but not completely