I was a member of Toastmasters and improved my speaking by practicing, learning from evaluations, and seeing others give speeches.
During each speech, an ah/um counter counts the number of verbal pauses during your speech. There is also a timer who will hold up a green card when you have a minute to go, a yellow card when you have thirty seconds, and a red card when your time has run out. There are ten speeches on the path of becoming a ‘competent communicator’. All attendees have forms so they can evaluate the speakers, but one person (the evaluator) is tasked with giving a speech at the end of the meeting about your speech.