If you believe the old song, "inch by inch, row by row," is the best way to make your garden grow. I believe.
I also believe it's a great approach for art. My daughter Mary went into her freshman art class saying, "I can't draw!" A few days later, she came home with this -- a really cool picture she drew by graphing the paper, and copying a picture from a magazine, inch by inch and row by row.
Could she have drawn the whole face? Maybe not. Could she draw one square inch of the face? Absolutely.
It's one more sign that breaking jobs down into doable chunks works. So, again, smaller is better! (Stop it. You know what I mean.)