kathy sierra has an excellent article on how to become an expert. here's a quote, that captures the essence of her post:
For the superior performer the goal isn't just repeating the same thing again and again but achieving higher levels of control over every aspect of their performance. That's why they don't find practice boring. Each practice session they are working on doing something better than they did the last time.
i've blogged about becoming a pro too; you can find the post here.