I have Far.exe as the first item in the start menu.
Richtext in the clipboard ->
ctrl-escape,arrdown,enter,shift-f4,$,enter
shift-insert,ctrl-insert,alt-backspace,
f10,enter
-> plaintext in the clipboard
Pros: no mouse, just blind typing, ends exactly where i was before
Cons: ANSI encoding - international symbols are lost
Luckily, I do not have to do that too often :)