The argument of Inking for the sake of printing is also obsolete in my opinion. Printing gray tones or full color paintings is just as easy as black and white now days. Printing in solid back and white is still cheaper but you can still adjust clean pencils to be black and white by boosting the contrast.
So for example, here’s one of my panels scanned from paper. This is a lower quality jpg so the image is a bit more blurry then my files but it should be good enough for this simple tutorial.

Here’s a closer look to see that it really is pencil. Number 2 pencil, to be exact.

If you select Levels in Photoshop by pressing Command+L (Mac) and whatever for Windows, then you will get this box. It might look different depending on what version of Photoshop you have.

Now pull in the sides until your lines get nice and black without screwing up the edges. If you want to go solid black & white then make sure your lines are nice and sharp as well as making a very high resolution scan.

I keep lots of grays to keep the subtile pencil marks in some places and there you have it.

Now I just need to clean up this crappy drawing. Sometimes my problem with this method is knowing I can fix any pencil lines I don’t like in Photoshop.  I end up flying through my final pencils with a bunch of little mistakes to correct later.

The other option is digital inking with a Cintiq or Wacom Tablet. I do this with an old comic that I’m slowly redrawing. It’s so easy it makes me question if I should even be drawing with pencils anymore. I just scan my thumbnail into photoshop and then lower the opacity of that layer. Then I make a new layer and with a black round brush tip, I draw my final lines. Instant Pencils and Inks in one easy step. It’s as easy to control as a pencil (especially with a Cintiq) and you can erase it as many times as needed before getting it right.

In the end, I guess it all depends on you. If you like traditional inking or if you’re a rock star inker then go for it. I just needed to eliminate unnecessary steps (and weaknesses) to speed up my output without sacrificing quality.

That’s my two cents.