Everything (or almost everything) you always wanted to know about inventing is available on the following websites.
Canadian Innovation Centre
On this website you will find an entire section devoted to 'Innovator Services' for inventors.
http://www.innovationcentre.ca/
Inventors Digest Online
A useful general website on happenings in the area of inventions and inventing.
http://www.inventorsdigest.com/
What You Need to Know About Inventors
Another useful general site on inventions and the process of inventing.
http://inventors.about.com/science/inventors/mbody.htm
Lemelson-MIT Program Invention Dimension
This site includes the Inventor's Handbook, as well as a list of resources for inventors (mainly books).
http://web.mit.edu/invent/
Inventor Education
Education and news for inventors.
http://www.inventored.org/