Underground X

Last week I stumbled across what has already been a massively informative resource on building a successful web business.

It is a series of free webinars given by two successful online marketing gurus who are allegedy so fed up with online marketing today that they have decided to set the record straight.

Here is the link to how I found out about the program, which includes the link so that you can sign up yourself (it's absolutely free, at least for now).

http://www.youngentrepreneur.com/blog/transparency-in-the-internet-marketing-world-finally/

My question is: what other resources, free or not, would you recommend?  What tools have you found invaluable?  Where do you look for help building websites or online businesses?  What do you find lacking out there?