I really enjoy scanning some of my artworks onto the computer and playing with them on different art editing programmes.
This gives me the chance to play around with filters and colours, and to also view my artwork in a different form.
Another benefit to using these programmes saves the artist time, because they can be used fairly easily and you have more freedom to play with the work, without having to permanently alter (correcting) the artwork in any way.
Here is a simple example I did using photo-shop:
