Checks NOTAMS here. I would suggest using the radius search function. This week give you NOTAMS for your local airfield as well as surrounding airfields and center NOTAMS.
An important site to check to stay clear of any Temporary Flight Restrictions (TFRs)
Another free resource, this FAA site has a number of useful handbooks covering topics from student pilots to instrument flying. Below are a few of the more important ones.
FAA inspectors and designated pilot examiners shall conduct practical tests in compliance with these standards.