An extremely useful additional technique is the "Screen Capture."

There are numerous ways that things on the internet can be posted that "inhibit" copying. For those circumstances:

Alt-PrtScn (The Alt Key held down while the Print Screen key is pressed) will place the "picture" of the Window that's active into the clip board.

Ctl-PrtScn will do the same for the entire face of the monitor.

Ctl-V will then paste the picture into another application like Word. (My preferred method is to use "File|New from Clipboard" in Photoshop Elements. Other "graphics" programs may - or may not - allow you to "paste" from the clipboard or "import" from it.)

The picture that you get is rather low resolution, typically 72 dpi, so where possible you'd want to zoom in to make what you want as large as possible on the screen before you "capture" it. (Some "copy inhibiting" methods, like Flash, don't allow you to zoom in.)

This is also a good method for snatching error messages in pop-up windows, unless the pop-up is one of those that closes as soon as you touch any key, or one that times-out and closes itself exactly at the instant when you find the PrtScn key that you haven't needed for a while.

This is another "slightly special" way of using the clipboard.

John