If you offer a service to a customer, make sure you going to follow through and that you really meant it.
There is nothing more annoying as a customer to end up with a broken promise. Such situations do not build trust, branding, relationships, etc.
Leaving your customers high and dry is the ultimate evil in the business world.
And I don’t mean offering a service and then giving some half assed attempt at following through. Offering training and then offering yet another sales pitch is horrible. Offering someone a white paper and then giving them a simplistic newsletter disguised as a white paper just doesn’t inspire the customer to come back.
If you say it, mean it and follow through! It is that simple!