To correctly portray complex data a developer must utilize modern data visualization techniques. This session will describe how to create data graphics (charts) and dashboards that are concise, attractive, and usable. Learn these practical design principles that apply to every data graphic you produce. Without this firsthand knowledge one can innocently construct visuals that erroneously represent data and mislead viewers. I will cover Important Visual Perception Patterns to Know, and the Top Common Chart Design Errors. I will also share the knowledge framework for creating effective graphical data dashboards. Apply the best design pattern every time using the "3 threes" -- a convenient memory hook representing the distinctions between systems that “monitor, measure, and manage” performance metrics for “operations, tactical or strategic” purposes. Become a hero of interactive data visualization. Copious examples included.