If you love your company and love what you do, you will serve your customers better-period!
If not excellence, what? If not excellence now, when?
Public Speaking is a skill that can be studied, polished, perfected. Not only can you get good at it, you can get damn good at it and it makes a heck of a difference.
Leaders don't create followers, they create more leaders.
Only pissed-off people change the world.
But there's no substitute for getting smarter faster. And the way you get smarter is to screw around vigorously. Try stuff. See what works. See what fails miserably. Learn. Rinse. Repeat.