Use the boards to move the puck. Don't consistently try to blindly fire the puck through the slot looking for one timers. Unless you're my opponent, because it's ridiculously easy to defend.
Also use your bloody defensemen in the offensive zone. I'm not sure how often I've seen forwards turn a 5 on 4 PP in to a 3 on 4 because they have no clue how to utilize the points. Again....ridiculously easy to defend.
Another one...dropping out in the last ten seconds of matchmaking because there isn't a human goalie. If you can't score on the AI, you should probably be playing something else.