One of the my favorite blogs on the planet is BPS Research,  where folks from the British Psychological Society summarize the latest psychological research -- and do so with delightful charm and accuracy.  I was just visiting (it is a great place to look around) and, as part of just one post, they offer "7 Ways to Be Good."

Check out these links to studies from peer-reviewed journals:

Learn healthier habits
Have an energy drink
Use your inner voice
Practise self control
Clench your muscles
Form if-then plans
Distract yourself

They are all wonderful, but I was especially amused by the experiment showing that students who (after an exam that presumably depleted their glucose levels) had a "high-glucose lemonade" were more likely to offer help to a classmate who was facing eviction and to offer larger donations to charity.  No, it wasn't just because the experimenter gave the students a gift...the students in the control condition (who were less generous) were given a low-glucose lemonade.  Sugar isn't all bad!