Public speaking is a career that can lead to more opportunities over time.
It is extremely important to dress well and look your best when you speak in front of an audience.
Here are some things to consider when you are making a first impression.

• Men - Wear a suit and tie and shine your shoes.
  Have someone look at what you will be wearing and give you their honest opinion.
  
• Women - A business suit is acceptable, but a dress will make a better impact.
  Avoid loud colors or patterns in favor of more conservative colors.
  Again, have someone else give you an honest evaluation of how you look.
  
• Have someone make a video recording of you when you speak.
  Be prepared to sit down and critique everything you say and do during your speech.
  You will be amazed at what you see when you watch yourself later on.
  Make notes on your posture, facial expressions, and how you speak when you are in front of the audience.
  
• Before and after you speak are also crucial times.
  You must be alert and aware of everything going on around you during these times.
  
• Eat lightly, beginning the day before you will speak.
  The day of your speech you will want to eat foods that are high in carbohydrates to make sure you have a high level of energy.
  Public speaking is like running a marathon, so be prepared physically.
  

If you take these things into consideration you will be able to speak in front of an audience and build your career as a public speaker.
I encourage you to learn more tips and techniques on public speaking.