Positive Psychology is a very interesting field.
Some things to help you be more positive:
1) Take a minute to write down 5 things your are thankful for every morning.
2) Take a few minutes to write down a positive experience of that day.
3) Simplify your life instead of multitask. concentrate on doing one job at a time and doing it well.
4) Exercise regularly.
5) Take some time to meditate daily.
So many very interesting articles and clips by: Tal Ben Shahar & Shawn Anchor.