Positive thoughts
Do you have a friend or (a) colleague that who complains a lot? He or she is always complaining about the wheather, the job, the salary, the school and other things.
Complaining too much is not good for your happiness. There are no researches about it, but if you think a little bit about people that who complain a lot, it is easy to notice that they aren't happy. Complaining too much makes your day (very) gloomy and boring. sad and bored. It's so awful when you have a person near you calling you? names or fighting with someone else. Those people don't let you either concentrate on your job or they on their job. <-Rephrase! They like to creating a chaos.
On the other hand, people that who have a positive thoughts take their day pretty easy get through their days easily. They seem very lucky!
I remember a manager I had one of my managers; he would always said say that Monday mornings are always good. He loved Monday mornings, as I do love now. I learned with him he how to see the good things on the Monday's mornings. Positive thoughts keep us on the right way towards the best things. It's hard to be always motivated and positive always, but that is something we need to keep trying. in our minds as much long we can.