Click on an image to open the corresponding blog. The blog will have a free pattern (if available), video tutorial link (if available), and the written tutorial.
If there is just a video thumbnail, then I do not have a corresponding blog.
This blog talks about burning on leather. It also discusses how to smooth leather. I will tell you now, that it is not necessary to smooth the leather before burning. Smoothing the leather compresses it, making the surface smoother and firmer. Depending on the application, this might not be a desired thing. Smoothing Leather
The blog also has some links to other blogs and / or videos I have that explain different things about leather.