Edit: It's not really professional, but it's okay I guess. Not really something for pro work but it's just a start
Hope that helps the splatter arena contestants, and other people interested in making comics faster, and good looking at the same time.
Also I forgot to place I do not draw on a huge canvas. Keep it somewhere around 900 to 1000 pixels wide. Drawing on a small canvas is much more faster.
I also make the speech bubbles transparent, so it doesn't hide too much of everything. Usually a transparency of 55% to 72%.
Coloring tutorial is here.[link]