Have you ever used conky? More precisely Crunchbang Linux? Crunchbang comes with conky installed by default on desktop and inside conky you'll see useful shortcuts that you can use, and it's visible all the time. See shortcut keys section.
I'm an emacs newbie, not new to emacs, I use it all the time when doing lisp but I don't do lisp that much, I spend most of the time using sublime.
So still emacs newbie and would be helpful if I can have such menu displayed all the time in a little corner inside the text editor. It should take no more than 10% of the screen or so.
Is there such plugin or option allowing me to display the shortcuts?