In most of my interactions with the partner developer community who are working on either Webcenter Projects or ADF related Projects, there are constant questions that come up on the documentation or samples or step by step instructions for novices. Though most of the resources are available online on the OTN site, there seems to be a difficulty in getting hold of the right resource for their job to be done, which i am yet to solve. However here is a list of resources that you should have been to if you in the oracle world and building rich internet based applications using JSF/ADF.

1. If you have just started with JDeveloper and wanted to the different nuances of ADF developement and want to deepen your knowledge you should definitely go through these tutorials:
http://www.oracle.com/technology/products/jdev/11/cuecards111/index.html

2. Everything about JDEV - includes the IDE download, demos, sample code, best practices etc.
http://www.oracle.com/technology/products/jdev/index.html

3. All About ADF: http://www.oracle.com/technology/products/adf/index.html

4. Know more about ADF Faces : http://www.oracle.com/technology/products/adf/index.html

5. If you want to deepen your knowledge here is the aggregate list of all the blogs by our internal development teams and experts from around the globe. This is really an interesting feed especially when you want to do a deep dive on various aspects and want to be an expert in the oracle UI world. http://www.connotea.org/user/jdeveloper

Last but not the least, you should always leverage the entire community whenever you run into any issues : http://forums.oracle.com