It Is Normal To Be Nervous.

Yes Indeed I Have Gained A Lot Out Of Playing Scales And Etudes.

Running Through Things Because You Are Familiar With Them, Breeds Routine And This Is The Seed Of Boredom.

Control Of Vibrato Helps Your Musical Expression.

Being Unprepared Heightens Nerves.

You Can Sightread Better If You Know Your Scales And Arpeggios.