Drawing is somthing that is only rewarded with practice. Unfortunatly, there's nothing I can really suggest that will help you draw yourself quicker. But if you've found a character that has similar facial features to yourself, then drawing that a few times will help get the feel for things like line curviture, dimension size etc.
Depending on how you draw (construction lines, or freehand) vaires the results. I must say that, using construction lines has more rewarding results but means lots of practice. Drawing freehand takes less time, but is more likely to end up unproportinal.
I'll try to explain my method, freehand;
When drawing a head, I draw in stages. It can be in any order, this is the way I find most effective;
Firstly the face (eyes, nose, mouth lines)
Secondly hair (your unique style if nessesary, or made up)
Then the neck (ear and neck line on one side, then connecting the chin to the neck on the other side)
Anyways, there is no secret code, or stratagy for getting it right. Its pure practice.
Hope this helps

Good luck!