A tour of the environment
Take a look at the tour slideshow:
Then go to GT in 7' videos.
Glamorous Toolkit features a few tools that can be used as entry points. Lepiter unifies knoweldge management with live programming. Start there with a note and evolve it into a program (Scripting, linking, documenting: Lepiter overview). The inspector offers moldable views over any object (Handling objects: Inspector overview). For static code we have Coder (Managing code: Coder overview).
However, these tools can be combined in many ways. For example, a Lepiter page can embed inspectors. And the inspector can show a Coder for editing the class of the current object. All these embedded in a Pager interface that allows us to concatenate larger exploration sessions and form unforeseen narratives.
Oh, and we should not forget about shortcuts, so do take a look at Basic shortcuts to learn about them.