I've found that using X11's highlight + middle-click paste has drastically reduced just about all of my reliance on using shortcuts for copy/paste, at least in

I've found that using X11's highlight + middle-click paste has drastically reduced just about all of my reliance on using shortcuts for copy/paste, at least in any application that requires me to keep my hand on the mouse (like a browser) rather than keeping both hands on the keyboard (like Vim).