The Stuttering Foundation of America has posted part of their book "Advice to Those Who Stutter" on this page http://www.stutteringhelp.org/default.aspx?tabindex=794&tabid=807 of their web site. There are so many helpful tips in this one page that you should read it very slowly and absorb each tidbit of advice.
"There are ways that you can stutter more easily, which sound better and make you more comfortable with your speech, and make a better impression on your listener. Listeners react to the way you appear to be reacting to yourself. If you seem to be tense, panicky, and out of control, they will also feel tense, to which you react by becoming more tense and hurried yourself. It’s a circular process that you can learn to control."