SQL Server Execution Plans

Here's a link on SSC to a free PDF download of Grant Fitchley's "SQL Server Execution Plans", which is, funnily enough, about how to interpret and act upon an execution plan in SQL Server. "Every day, out in the various SQL Server forums, the same types of questions come up again and again: why is this query running slow? Why isn't my index getting used? And on and on. In order to arrive at the answer you have to ask the same return question in each case: have you looked at the execution plan? " – Grant Fritchey