People who tend to react to a problem only when it's gotten serious could be called reactive people. Until recently, reactive (in this sense) didn't really have an antonym. So proactive was coined to describe the kind of person who's always looking into the future in order to be prepared for anything. A good parent attempts to be proactive on behalf of his or her children, trying to imagine the problems they might be facing in a few months or years. A company's financial officers study the patterns of the company's earnings to make sure it won't risk running short of cash at any point in the next year or two. Proactive has only been around a few decades, and it can still sometimes sound like a fashionable buzzword.