Resizing a window when bottom right corner is off-screen

Just right click, choose "size", then hover over another corner until you get the diagonal double-arrow resize cursor.

Actually, you don't need to right click and choose "size". You can resize from any corner in Windows 7.

I guess they just keep the item on the menu, because otherwise people would be phoning into ask "where did it go? how can I resize my screen?" :)