I'm convinced of this: Good done anywhere is good done everywhere. For a change, start by speaking to people rather than walking by them like they're stones that don't matter. As long as you're breathing, it's never too late to do some good.
Keep your thoughts positive because your thoughts become your words. Keep your words positive because your words become your behavior. Keep your behavior positive because your behavior becomes your habits. Keep your habits positive because your habits become your values. Keep your values positive because your values become your destiny.