In KiCad, the INSERT key repeats the last command. This short repeats wires and labels. And labels get auto-incremented!
In KiCad 6 (and 5), the F8 key runs a special command. It automates annotating a schematic, generating a netlist, and loading it into PCBnew. Also the “Edit Symbol Fields” is a better tool for updating footprints than the actual “Assign Footprints” dialog! This video is the first one of a series of quick tips.