If you like to draw the ol' fashioned way on occasion, sometimes you go to the art store and buy pencils and such...
Anyhow I went and got some extra "Ebony" pencils, because they draw nice and dark and fairly smoothly without a lot of pressure. So when doing quick random sketches, they're hard to beat.
You would think they're all the same, but there happens to be more than one brand with that label or designation. I found in my own testing that the Eberhard Faber ones draw just a bit darker and smoother than the Sanford ones.
So take note if you see both brands available at an art store, the Eberhard Faber ones are better. (At least for the "Ebony" type pencils. Your results and consistency may vary for other types.)