The term of Ludology (ludologie) (Etym. Latin Ludus = game) is used for a while in Europe to define the study of games (mainly board games) and has been "rediscovered" and is used now in many research papers on Video Games. Gonzalo Frasca dedicated a web site to this subject: ludology.org.
The definition of Ludology from Gonzalo Frasca.

About Game Design:
• gamestudies.org
• gamasutra.com (see game design section)
• The Games Journal (on Board Games)
• gamedesignpatterns.org

About Mind Mapping: Mind Maps (c) are specific heuristic maps based on drawing rules developed by Tony Buzan in the late 1960's. It's a powerful graphic tool especially for brainstorming, keeping tracks of projects, collecting notes...

• FreeMind (Free MindMap)
• Official Mind Map Web site