InDesignSecrets Plug-in
InDesignSecrets is a free plug-in for InDesign CS or CS2 that provides an on screen "Tip of the Day" each time you launch Adobe InDesign. The tips were written by bestselling author David Blatner and the plug-in developed by aextra software. Dozens of tips are provided for novices and experts alike.
You can download this free plug-in here:
Macintosh version | Windows version
The InDesignSecrets plug-in is similar in some respects to the InTips plug-in published by ALAP. However, InTips was discontinued along with several other InDesign plug-ins after Quark purchased ALAP and shut down its line of InDesign products. Now, the InDesignSecrets plug-in offers a new feature that can automatically download new tips important to InDesign users as they become available.
You can also sign up to receive a "tip of the week" from InDesign Magazine.