To begin with, develop the habit of looking at your product as though you were an outside marketing consultant brought in to help your company decide whether or not it's in the right business at this time. Ask critical questions such as, "Is your current product or service, or mix of products and services, appropriate and suitable for the market and the customers of today?"
Whenever you're having difficulty selling as much of your products or services as you'd like, you need to develop the habit of assessing your business honestly and asking, "Are these the right products or services for our customers today?"
Is there any product or service you're offering today that, knowing what you now know, you would not bring out again today? Compared to your competitors, is your product or service superior in some significant way to anything else available? If so, what is it? If not, could you develop an area of superiority? Should you be offering this product or service at all in the current marketplace?