While Express Scripts (NASDAQ:ESRX) took a bit of a fall after its disappointing outlook last quarter, in the following video Motley Fool health care bureau chief Brenton Flynn reminds us that the best way to invest is to understand the core of a business in the long run, rather than focusing on short-term news. He shares some key takeaways from the company's presentation at the JPMorgan conference this week, beyond the typical "generic utilization" metric often cited as a boost to PBMs, to give us some of the things Express Scripts sees as real growth drivers for it for the long run.