Being obsessed with perfection is unhealthy. No one has ever written a perfect resume. No one has ever written a perfect sales pitch, or marketing plan. Excellence is about being better than your competition in a certain area. Excellence is being the best than you can be on any given day.
Excellence is the ability to do the exercises of success.
You have something different that no one else has to offer, your personal perspective. The difference between you winning and losing is your ability to sell your uniqueness. Sales skills are simply communications skills, people skills. You may have to sell your business idea to a banker to get a loan, or to a prospective employee, partner, or associate. Every person on your staff who meets or greets people face to face or over the phone must be aware of selling and servicing clients.