Adobe TV is full of great tutorials and tips on all their products including CS6, here are some to get you started.
1- Working with Images in Adobe CS5
2- CS5.5 Workflow : Photoshop and Indesign
3- Place InDesign Files as Graphics in Other InDesign Files
4 – 10 Random InDesign CS5 Tips and Techniques
5 – Top 5 Indesign CS5 Features