My First Tutorial
Prompted by the success of others who have gone before, and also especially by Jill Kollmann, a fellow PCAGOE member, I created, photographed and wrote the copy for a Tutorial on the new-ish website ClayLessons.com. I chose a liquid polymer bangle bracelet for my first (yes, I'm hooked and have at least one more in mind) tutorial. That technique is one of my primary niches at the moment, and people actually seem to want to know how to do it.
So, I got everything together, and set up the camera on my new tripod. I started making this bracelet, stopping whenever it felt like I was starting a new "step" to pull the tripod in front of me, hold my breathe and take a focused photo of that point in the process.. 
Photography, or rather later editing, was tricky. My studio isn't the best for taking consistent photos, which is why I built my poor-woman's light tent out of stuff lying around the house. But, I couldn't work inside the light tent, so there is more variation in the color of the photos than I would have liked. Still, the intent of the lesson is there, and I ended up including over 50 unique descriptive pictures.
There is the question: If you sell the technique, won't everyone who was going to buy your bracelet just pay 1/4 of the price for the tutorial and make their own? The answer, IMO, is a resounding - probably not. I believe that there are two separate audiences: the artistic/crafting audience who would admire, but generally not buy the finished product from another artist working in the same medium and the non-artisan audience wouldn't or couldn't make their items.
So, I see this new trend towards tutorials as win-win for the artist - you can sell both the finished product and the knowledge. There is a market for both.