Your customers know things about your business you aren't aware of. Things that limit your ability to grow. Things you do as a habit you aren't likely aware of. Things you'd change if you only knew better.
More specific, there are nine things you may unknowingly be guilty of that's limiting your potential. Patronizing your customer, not staying current with trends, and inconsistency are but there. NFIB has identified Nine Things Your Customers Will Never Tell You.
You need to be aware of the non-verbs of your business. They're just as limiting as obvious blunders. Worse, you usually aren't aware of non-verbal blunders until your business is suffering from them.
Are they're any items you'd add to NFIB's list?