If you mean planning, I generally have little to no idea how I'm going to make something when I do, but instead just tend to try stuff out and see what looks right. If you already have a general idea of what you're going to make, you can probably elaborate in your mind before starting. Depends on the artist, really.
THEY TOLD ME I COULD BE ANYTHING SO I BECAME A SIGNATURE PLS HLP
I have an idea of making a bhg sig for my char Bianca Chevalier based on that vector trace close up of Tessa from Full metal panic I fixed the eyes and hair it looks like her (changed eye color just figured how Im gonna put it in with the BHBC without pushing the size limit. or making the face come in a corny way.