I have learned some things while writing my second book. Research is a journey. Methods of extracting coal, how to refine metals, how to make a charcoal press, uses of coal (toothpaste, really) and Geothermal heating to name but a few of the tidbits of info I have encountered along the way.

I have also discovered sometimes its better to just let the characters do what they want instead of trying to make them fit into the narrow step sheet you have created. Sometimes you find gems you never knew were there waiting for you to mine.