Assuming your window manager has some overall spatial layout of desktops, or a preview that highlights the current desktop: why not add a 9th one? Then you can

Assuming your window manager has some overall spatial layout of desktops, or a preview that highlights the current desktop: why not add a 9th one? Then you can arrange them in a 3x3 grid in your window manager, the same way they already are on your numpad. I do this and it gives an incredibly tactile feel to desktop management.