Nowadays everybody can make great drawings using photoshop and other digital software programs. That is since traditional drawing is way harder than digital and you can make much faster progress. But if you can make great traditional drawings you can make more distinct and "real" drawings, as is it also a great foundation and techniques learned in the traditional drawing can be a great help whilst using software.
Smashing magazine collected FIFTY (!) tutorials and techniques to make your traditional drawing much better, even for the people who never made drawings before (like me) there are some great tutorials from the real beginning. So if you want to know how to draw lips, cars, optimus prime, dogs, hair, eyes, hands, roses and so go have a look!!