Here is a collection of tutorials, white papers, forecasting methods, etc. As I spend more time working on something, I dig deeper and I document it. Sometimes it turns into a tutorial, sometimes it is a white paper and sometimes it is a new method or a model I developed. A combination or resources that you might find useful. Let me list what I have here so far:
A forecasting method - A pattern recognition method I call APRE
Fourier analysis - A very practical and hands on tutorial using Excel
Error metric - A white paper on how to select the best measurement error
Prediction interval - A tutorial on how to deal with uncertainty