Found out, that for me - patience is everything in art. A fast artwork is usually a bad one, and every extra hour makes it much better. So when i think it's done, i try to spend at least two more hours doodling around and fixing little mistakes, which usually determines the quality of the overall look.
Well, you don't have to finish your artwork in one day. When you run out of time, leave it for later, and so on. There's always the choice, either to make more quick pieces or one larger more detailed piece. A challenge.
yeah but every time I stop for about 2 or 3 hr I'd forget(bad memory)what I'm doing like the expressions on part of my face would be different or facial features would be odd or too different mainly because of my lack of knowledge of the facial anatomy but I'm still learning even do I'm failing
Try making a quick sketch on another piece of paper, for reference and to remind you what was the early intention. Or for the anatomy, try to take a picture of the face you are drawing. You'll do great. You'll see.