Students of public speaking continually ask, "How can I overcome
self-consciousness and the fear that paralyzes me before an
audience?"
Did you ever notice in looking from a train window that some
horses feed near the track and never even pause to look up at the
thundering cars, while just ahead at the next railroad crossing a
farmer's wife will be nervously trying to quiet her scared horse as
the train goes by?
How would you cure a horse that is afraid of cars—graze him in a
back-woods lot where he would never see steam-engines or
automobiles, or drive or pasture him where he would frequently see
the machines?
Apply horse-sense to ridding yourself of self-consciousness and
fear: face an audience as frequently as you can, and you will soon stop shying. You can never attain
freedom from stage-fright by reading a treatise. A book may give
you excellent suggestions on how best to conduct yourself in the
water, but sooner or later you must get wet, perhaps even strangle
and be "half scared to death." There are a great many "wetless"
bathing suits worn at the seashore, but no one ever learns to swim
in them. To plunge is the only way.

Dale Carnegie