If you Alt-Space, M, and press one of the arrow keys, the windows will 'stick' to your mouse cursor so you can just wiggle your mouse after they key combo to bring it to you.

The old CUA, Windows 3.0 corner square has an oblong rectangle that represents the space bar (at least in my mind). Unless the window is a child window, in which case the shortcut is Alt-Hyphen[1], and I haven't used that shortcut in many years. The fashion for tabs has probably made that useless.

[1] http://www.robelle.com/smugbook/win3x.html

I was inspired by nostalgia to do the research via archive.org: This shortcut goes back to Windows 2.0, almost 35 years ago. I remembered it from the 3.1 days.