CAD is a wonderful tool and learning to use it was the most exiting 3 days of my whole graphic arts experience . . . but seriously though - learn all you can from it! My biggest problem is that once I know how to do something I move on to the next thing. It seems I'm more curious about how something is done than how to present it properly to others. This is the wrong approach and a major character flaw for an artist; I'd say you should choose one way of doing things and keep doing them in that way until you are expert enough to put your personal touches on it . . . one of those do as I say not as I do type things.