A friend of mine recently outlined as follows his method for thinking about important issues: Look at the big picture, avoid groupthink, and remember history.
First, the big picture. People too often think only about the narrow field in which they work or the community or nation in which they live. But whatever the topic, there is always a context that includes the rest of world and the interplay of actors and forces in many locales and fields of endeavor.
Let me provide an illustration (not one provided by my friend). If I want to understand the state of renewable energy in the United States, I'd certainly want to know also the state of that industry in other countries including their regulatory regimes; the structure of their industry whether public, private or a combination; and the state of research and development. I'd also want to know how renewable energy fits into the total picture of energy use, for example, its current share of consumption compared to competing sources of energy and its growth rate. Further, I'd want to know about the emergence of electric vehicles, a major new user of electricity, and about the industry that produces them. I wouldn't stop there, but what I've outlined so far conveys the scope of inquiry that I'm recommending.