Accept all speaking events
If you are lucky enough to have people reaching out to you to speak about your start up, accept all speaking events.
This is an excellent habit to form and will help raise tremendous awareness for your startup.
Also, don't use the excuse that you aren't good at public speaking. Neither am I, but the only way to overcome your fears and improve is to step out of your comfort zone.
Quote: Life Starts on the Edge of your Comfort Zone.