Don't let doing enough be good enough.
If you turn your back on a customer, you turn your back on success.
There's no such thing as the very best. If you're doing your best, it's only because you haven't yet found a way to do better.
What's possible today isn't bound by what was possible yesterday, and is never a measure of what's possible tomorrow.
The right measure is not how many customers you've got, but how closely you hold them.
Testimonials describe what has been, and are a promise of what is to come.