If you want to influence people, give them the right environment. Of this there is no question. Most recently, a study confirmed what we all knew about how they cleaned up New York City. This line from The Globe and Mail a few days ago:
Urban decay is contagious because people generally behave badly when others in their neighbourhood do, say Dutch researchers whose article was published yesterday in the online journal Science.
This principle applies in the home and in the workplace, too. If you leave things all over the house or allow employees to get sloppy in their work habits, expect more and more of the same.
On the other hand, if you want people to take pride in their work or keep the house tidy, apply yourself to the task. Pick up stuff around the house when others are not around. And when they are, solicit their help in tidying up. The tidier you keep it, the tidier they will, too. And, the more attention they will focus on cleanliness and following rules and generally responsible behavior.
By the way, this is the same psychology I have repeatedly mentioned with regard to smiling. The best way to brighten up your environment is to smile. Your smile will be contagious. And before you know it, you will notice that all those grumpy people you kept bumping into have given way to smiling, happy people.