I keep good notes about each batch such as recipes, amounts, temps, efficiency, and dates, but never thought about doing a checklist. The only things I ever seem to forget are aeration and the whirlfloc. I have a rule not to crack a beer until flameout, so fortunately the forgetfulness doesn't get too out of hand!
Maybe I'll end up like those people who like to write things down and cross them off to feel more productive. 1.) Mash in.... Check!