Although I read a few books that described the tools and the techniques for working with metal clay, the most useful tutorial was this YouTube video.
It’s long, but comprehensive; it walks you through the entire process, from rolling out the clay to firing it and polishing it and gives you a few hints along the way. I can’t say exactly what it is about the video that works so well, but I’ve gone back to it time and time again. For the longest time I had the time mark for firing memorized because I kept forgetting how long to fire for! Now I’ve done it often enough that it’s ingrained in my head.
How do you learn new things best? Reading, listening, hands on?