GTD stands for Getting Things Done. In order to Get Things Done, you need to know what those Things are.
Enter the concept of actions. An action is anything you wish was not the way it was now is considered an action, no matter how big or small. Those you can actually do something about are called actionable–you can take action on them. All actionables are actions, but not vice versa. Some actions you need something out of your control to change before they come actionable. (more…)