This link is to a list of general Rules and Guidelines that will help the average oval racer keep out of trouble and finish races.
These are the original Surviving Rookies videos among other useful videos we have found to help you through your iRacing career.
Currently contains the setup Matrix.
Great source for information about setting up cars and how the car parts operate and interact with one another.
If you have not checked out the forums for iracing please do so. There is a lot of good information and resources out there.