Do you know where to go to find the BEST resources you need to help promote Drupal as the best solution to your prospects, clients, employer, stakeholders, etc??
One of the suboptimal techniques that developers often use, is a query that retrieves the entire content of a table, without any conditions or filters.
For example:
When working with Drupal as a backend for mobile applications, and serving the information via RESTful services, it is important to limit the number of needed requests from the site to the minimum.