I haven't seen this article before but I apologize if this has been discussed.
I decided to download a bunch of JW literature and came across this special bulletin from 1928, a special colporteur edition. It was written by the society and sent to the roughly 1400 colporteurs, which is someone pushing religious books and magazines.
If you want the entire bulletin id be happy to email it. But I wanted to share the part that grabbed my attention and provided me a laugh. They sum up the bulletin with suggestions on how to sell the most crap. Its a combo of the Ministry School book and the KM, where they have examples for preaching and such. You know, where you say this if the householder says this and so on.
Here's a few paragraphs I loved.
"Here offer them the books and state the price and tell them how helpful they be in their bible studies, also tell them how many you are selling to your neighbors. Try to get them to buy, but don't let them say no. Watch their lips, and if they don't show signs of buying, start to canvass again, using these questions...
If they don't buy yet, show them another question or two; try to close the sale.
If they simply won't buy, look for someone else. Don't spend too much time with any one, and don't preach-sell books. If you want to preach, rent a hall. "
Anyway, that last line made me laugh.