The United Inventors Association is a non profit organization founded to help inventors. They have set themselves up as a membership website that offers accreditation for service providers with a variety of membership options.
There is a free option which is restricted in many ways and also paid options for inventors and entrepreneurs. The primary differences in these membership options is the access to their article library. My recommendation is to join their free email membership and read the articles on this website for free.
I am a member of this group primarily to make sure I don't miss an important inventors event. They publish a calendar of events that cater to inventors including events held by the US Patent Office and inventor friendly trade shows.
They also provide a list of all the accredited inventors clubs around the US. Make sure to join your local inventors club so that you can associate directly with like minded individuals.