For AutoCAD users who are struggling to come to terms with the shortcuts in ArchiCAD (AC), here is a handy conversion guide compiled by Architect Geoffroy Magnan. What I liked most was one simple sentence telling me how to back up my AC preferences; that and the section on Library Management.

Go to: http://users.swing.be/geoffroy.magnan/archicad/transition/

Edit: As Geoffroy himself says, in the first comment, it is still available at:
http://web.archive.org/web/20040626064750/http://users.swing.be/geoffroy.magnan/archicad/transition/