[Aloisius]

If you don't have a multi-touch pointing device, I suppose. Though, it's like trying to use Windows with a single mouse button.

You can also hit ctrl-left or ctrl-right to move spaces without one or ctrl-1, ctrl-2, ctrl-3, etc. to switch to a specific virtual desktop directly.

You can also hit ctrl+ scroll wheel if you have one. Or add mission control hot corner to one of the screen corners.