Although I am a traditional artist, i.e. I do not work digitally, I do at times use the technology available to me to make my life easier and to achieve my goals at times. In saying , here is an example of what I mean.
The images you see in this post are scans of the actual size of a piece I started the other day, and was not happy with the face I had draw. So instead of reworking it a bunch of times on the actual image and ruining the surface of the paper, I scanned the head in actual size. Then I just made a couple of sheets with the multiple head "blanks" on it so that I can work it out that way thus preserving the original piece.
A little extra work, but if you think about the time doing this verses the time of re-drawing a whole image.......well worth the effort.
One other thing done in this is after scanning the image, I flipped it around so that it is a mirror image to the original, that way when I go to transfer the image via tracing paper, all I have to do is go over the lines twice instead of 3 times.