I use ivy-mode. Apparently it's not the cool thing anymore, but I use it because it's simple and it works. With ivy-mode enabled, anything Emacs asks you that h

I use ivy-mode. Apparently it's not the cool thing anymore, but I use it because it's simple and it works. With ivy-mode enabled, anything Emacs asks you that has a list of options -- so, M-x, file selection, buffer selection, etc. -- will pop up a little menu right in your minibuffer. It should be available in ELPA, with a more recent release in MELPA.