Another vote from me for Markus Winand's guides (first two). They are the first place I point people who have the basics down. There are great and amazingly sim

Another vote from me for Markus Winand's guides (first two). They are the first place I point people who have the basics down. There are great and amazingly simple discussions about the tradeoffs and design decisions that need to be considered when designing and optimizing a schema, with practical advice and information.