+1 for studying database design/normalization. I took a class on it and the analyses of performance on different queries for different organizations was somethi

+1 for studying database design/normalization. I took a class on it and the analyses of performance on different queries for different organizations was something I probably wouldn't have understood just by reading a book. Understanding how it works will also give you the courage not to be a slave to other people's recommendations; sometimes you want to duplicate data for performance reasons, but you have to make sure to manage that in your control logic.