I have xclip installed (it copies/pastes from the X11 clipboard as a commandline utility), and having long had 'xc' and 'xp' shell scripts, finally added 'xpc' to paste from the 'CLIPBOARD' buffer after getting frustrated once too often that I wasn't able to do so.
I'll use these to "read in" files:
xc < filename
And then in vim (faster than toggling paste mode):
I'll use these to "read in" files:
And then in vim (faster than toggling paste mode): or