Heaven4Affiliates is the best affiliate marketing resource that I could find online. There are reviews of various programs, software's and networks, as well as a detailed analysis of what it takes to make money with affiliate marketing programs.
The second affiliate marketing website that really offers value is MyAffiliateMarketingEbooks which consists of recommendations for 2 different affiliate marketing ebooks that are either for newbies or for intermediate marketers.
The third one is an SFI marketing program site that offers a lot of articles and training for new SFI affiliates.