Toastmasters has been a big help for me. You get to practice speaking in front of a group of people who are all there to practice speaking as well. Knowing everybody is there to learn the same skills takes some of the pressure off. Plus every time you give a speech somebody is assigned to evaluate it in the same meeting. So you get instant feedback and constructive criticism.

Another big advantage of Toastmasters is that there are a lot of opportunities for impromptu speaking. This made me very nervous at first but it’s incredibly valuable to practice speaking for 1-2 minutes without notes.