Here's a tip for people whose screens have multiple windows. I copy and paste a lot of text with my mouse, and sometimes I need a place to put text temporarily. For example, I'll put together pieces from a few command lines, write a reminder note to myself before I go to lunch, or keep a bunch of text I can copy with my mouse as needed.
Some window systems have a clipboard window, but I almost never use mine. Instead, I use one of my terminal windows to make a throwaway space like this:
cat > /dev/null Updated version number in title. . Added disc icon for second edition. .[CTRL-d] %
In the example above, I wanted to choose between two responses to give to
cat > /dev/null reads whatever I type and
I can type as much stuff as I want, then type
CTRL-d at the start of a line when I'm done.