To cautiously and slowly go where we have gone before and do the same thing over and over.
I'm going make a prediction: NASA will not be the first to discover alien life. China, Russia or some other space agency will do it first. Or perhaps even a private citizen like Bezos or Musk. NOT because they got there first, but because NASA has no freaking vision. The Viking failure has eliminated every ounce of boldness from NASA's DNA. They are determined to slow-walk (actually slow-crawl) the search for life in the solar system.