Guimond Method
This method is very popular because it is efficient. For the first step, solve just 3/4 of a face of opposite colors, which means you have to get three stickers of one color and the opposite color on one face. You can usually get this step in one move or less, so you can look forward to the next step. In the next step, you finish the face and orient the opposite one, so that you have two opposite faces of opposite colors. Then you sort the opposite colors by putting all of one color onto one face and all of the other color onto the other, and finally you permute both layers like in Ortega. Except for the last step, all of these steps usually take four or less moves, and experienced users can often look all the way through to the last step during inspection. Guimond requires 21 algorithms (or 13 without reflections).
