For instance, have you ever noticed that the people who demand things from others are the same people that others complain about at the water cooler. The say they are aggressive and generally people resent having to do things for them. On the other hand, people who use the words "please" and "thank you" and genuinely mean it are more likely to get things done and to get them done with a smile.
So, the next time someone does something for you, say "thank you". When you notice that someone has done a good job, let them know. When it looks like someone could use some lifting up, show some appreciation for something they have done lately. Showing thanks at work - using the words, "please and "thank you" means a lot to people.