I am going to need this when I alter my dress! This sewing tutorial explains how to make a pocket, gives you a pocket pattern, and tells you how to add an in-seam pocket to any dress (or pants, or anything really), making it SO MUCH MORE USEFUL.
Sewing Conversion Table - Convert between Metric & Imperial measurements. There is a link to a PDF file towards the end of her post. This will be handy when you've a free tutorial that uses "the other" measurements.