QUOTE (onona @ Feb 15 2010, 07:54 AM)

Don't draw from photos, draw from life. Copying from photos simply trains your brain to copy shapes, whereas drawing from life teaches you about interpreting perspective, definition, form and lighting. If you cannot attend a life drawing class, ask a friend of family member to pose for you. Personally, I also find that drawings based on photos tend to look quite flat and lifeless.
I would also suggest you become a little more confident with your line work. Your short, sketchy strokes indicate a possible lack of confidence - have more confidence in yourself to place longer lines on the page. If you're worried about making mistakes, just place lighter lines until you're happy with the shapes, and then go over them again with darker strokes.
I couldn't disagree more.
Drawing from life and photos are different, but not that different. In fact, you can get better results from drawing from photos as it allows you more time and freedom. You have the ability to use different techniques for scale, ALL of the depth and form is in a photo, just like in real life. I've done a lot of both and I prefer photo references.
The line work. In reality, there really are no lines. You need to mold form with value. Value changes create edges which, in turn, create your "lines" for you. Edges are value changes are the key to realism. Stay away from drawing lines, learn to identify value: DARKEST, LIGHTEST, EVERYTHING IN BETWEEN. Learning to see what you're really looking at and doing it justice on your work will create the depth and form which creates what it is you really see.