If you want more "aha! moments," change the way your brain looks for solutions. Instead of stating what you need to figure out, phrase it as a question.
How can we increase revenue in 2013?
In what ways can we change our process to make it run more smoothly?
By phrasing what you need to accomplish as questions, you empower your subconscious to start finding answers while you work on other things. Ideas are more likely to appear out of the blue after you've created a habit of priming your mind.