Your most comfortable posture may be as a couch-potato.  The very act uses little energy.  You can pass criticism onto the performers and you are insulated from the judgment of others. Courage is not needed, unless you wrestle the remote away from your children, of course. 

The "vegging-out" of America is deadly.  It destroys goals, eliminates the development of ideas, and eradicates the need to develop courage and determination.

Ruth Gordon, American actress, pointed out that "Courage is like a muscle; it is strengthened by use."  It may be difficult for you to believe that some presenters who seem so suave and articulate in the spotlight may, indeed, need to strengthen their self-confidence as much as you do.  They may be relative newcomers to the performance stage.  Many techniques used by seasoned public speakers may be foreign to them.  They may not fully understand the lingo used by the public-address technicians or the meeting planner.  Perhaps they prepared a presentation for 1,200 people and only 5 showed up.  They may have been told some critical piece of equipment would be available, only to find that it was overlooked in the pre-production rush, and no back-up is available.  These kinds of situations can dramatically affect the confidence level of the presenter at any given venue.  Self-confidence needs constant replenishment in all people, or it quickly wanes.

You will often find recommendations from those who have achieved great success, to read quotations and books on personal development.  Powerful people read for an hour every morning, before they start into the meat of their day.  They gain insight and encouragement through the eyes and experiences of others. It is like taking vitamins that pump-up your energy.  Although this practice may seem like an insignificant habit, it increases your level of enthusiasm.  It renews your internal reserve of courage, confidence and persistence.

"It is with the heart that one sees rightly; what is essential is invisible to the eye," wrote Antoine de Saint-Exupery, French aviator and author. 

Persistence in self-development will markedly advance you toward your determined goals.  When you commit to this advancement, miracles begin.  William Inge said, "Nobody is bored when he is trying to make something that is beautiful, or to discover something that is true."