Day 5 of my 10 Days to a Happier you series:
Day 5 is: Practice smiling
Smiling alone makes you feel happy, but it is even better and more effective if you back it up with positive thoughts. Smiling is also said to improve your attention and also help us perform better on cognitive tasks!
Want even more info on smiling and it's benefits? Here is a great blog on it called science of smiling.