In the simplest case, try to change the roughness of the surfaces of touching objects. This can be achieved by grinding. Body, interacting surfaces which are smooth, finished to a gloss, will move relative to each other is much easier.
Possibly replace one of the contact surfaces on the one that has a lower coefficient of friction. This can be a artificial coating; Teflon has one of the lowest coefficients of friction equal to 0.02. Easier to change the element system, which plays the role of a tool.
Use lubricants, by entering them between the rubbing surfaces. This method is used, for example, in skiing, when the working surface of the skis is covered with a special paraffin lubricant, corresponding to the snow temperature. Lubricants used in other technical systems, can be liquid (oil) or dry (graphite powder).