I most commonly use Photoshop sketching everything out in a rough fashion and go over it in a new layer.
With new “modern technology” you can essentially draw on the computer just like you would in real life. Minus all the dead trees.
Here is my weapons of choice. Wacom Intuos 3 tablet with pressure sensitive pen and two sonic screwdrivers… you never know when you will need one.
Lastly two posable art figures complete with nipples.
Hope this answers all the questions that were never asked.