Spasmodic dysphonia, also known as laryngeal dystonia, is a disorder in which the muscles that generate a person's voice go into periods of spasm. This results in breaks or interruptions in the voice, often every few sentences, which can make a person difficult to understand.
Scott Adams had spasmodic dysphonia, and talks about how he overcame it. He then goes on to talk about how to fail at almost everything and still win big! Is passion the answer? No. Scott recommends having a positive attitude, lots of physical energy, and following a system.