Chad
One of the biggest lessons I have learned is that of a technical basis.  I received a call from one of my accounts late on a Thursday afternoon complaining of a shiny streak down the center of their panels coming off their Costa abrasive plainer.  I told them that I would visit first thing the next morning.  Upon my arrival I went through the normal procedure to determine where the streak was coming from.  I looked at all three belts to determine which belt were the cause, as well as checking stock removal and asked if their procedure had changed.  I was able to locate the spot on the belt which was not cutting into the panel.  I looked throughout the machine and could find no cause.  By coincidence I had made arrangements for a tech the next week and informed the customer that I would bring Tony by Monday morning for evaluation. 
Tony and I arrived Monday and within a few minutes Tony had fixed the machine. The problem was a piece of a broken belt that had become lodged against the head that was not visible from the belt loading side of the machine.  The operator informed us that a few days ago a belt had broken and he thought he had cleaned everything out.  To his defense I couldn’t see the piece either.  Once the lodged paper was taken out the machine the streak disappeared and the machine has been running great since.
My lesson is to not be afraid to get “dirty” and inspect all areas of the machine when a problem arises. 
I was in pursuit of a fairly large account that I had on my radar for several months. The account is a producer of contract furniture casegoods and upholstery.  After several visits I was able to try disc and back up pads in the upholstery side.  The test was a success and I received a commitment from the powers to be to buy our products.  During the testing phase I received word that the plant manager that I was dealing with was being promoted to VP of Operations.  Great news I thought. 
I was able to save the upholstery side around 50% on their current abrasive cost which was a small % of the companies overall abrasive costs.  The casegoods division was obviously the major abrasive user in the company.  With the gentlemen I had developed a relationship with being promoted I assumed that I would be able to keep my momentum and go straight into the casegoods.  I set up a test with a couple of widebelt machines and brought in technicians.  The tests were a success.  I was quite surprised with the delay from my “friend” from this time forward.  I was constantly being asked to lunches and dinners as well as other perks.  I spent several months perusing the prospect while only receiving minimal orders.  During this phase “entertainment” was getting a bit out of hand.  I have since stopped dealing with the account due to their indecision.  I have learned throughout the whole process that even though I was dealing with the VP that the casgoods Plant Manager had more power than I realized.  This turned into a major political process due to the plant manager’s refusal to change from 4mm. 
My lesson here is simple.  I will no longer spend countless hours without getting something in return.  I have realized that people will allow you to go the extra mile as long as a commitment is not being forced.  After I had put cost guarantees in place and still no commitment I decided to spend my time where I could win.