If you're trying to achieve, there will be roadblocks. I've had them; everybody has had them. But obstacles don't have to stop you. If you run into a wall, don't turn around and give up. Figure out how to climb it, go through it, or work around it.
I was very nervous about going up to teach at Stanford and very nervous even about going to ARPA.
The first Victoria's Secret model I ever met was Adriana Lima, and she was so nice to me. She was very generous and very nurturing. She made sure people talked to me!