I can't agree with the `2. Don't use the mouse'. Unless Emacs' mouse support is completely broken (doubtful), mouse is only going to increase productiveness. http://plan9.bell-labs.com/wiki/plan9/Mouse_vs._keyboard/ind...
Thus, once you are no longer a beginner (the guide's target audience) you may graduate to keyboard+mouse. I don't use emacs or vi(m) or anything truly in line with them (textmate is my closest) but I have no doubt that someone who uses only the keyboard for three months and then reintroduces the mouse will show a greater capability with the tools than the same person spending the same time using both keyboard and mouse.