Excellent post. Results from advertising isn't always 100% quantifiable, but with the advent of online analytics, it can get pretty close! We do a lot of phone sales and find out most people who call find us via "the web" but without asking specific questions we don't know exactly through which channels, and that can be a difficult hole to patch. I appreciated your insight about putting a promotion out and not necessarily yielding results right away...it is good to be reminded of this fact, as it can get discouraging if there isn't immediate response. We are currently promoting a new tire changer, but it's not the type of equipment everyone is looking for all the time. It's a very niche market. Very well written and highlighted some channels we have not yet investigated.