This is Day 80 of the Positive 100, a countdown to Rare Disease Day 2014 and an exercise in being positive despite it all.

Smiling is an instant mood lifter for you and those around you. When you have a bad day, simply smiling can help turn it around.

This is our fourth and final smile in the challenge. (Smile #1, Smile #2, Smile #3)

I even made a poster with a proverb about smiles: “A smile sent will always return.” Sounds like a solid investment to me.

How did you share a smile today? Share your answer on social media with the hashtag #100positivedays on Twitter, Instagram and Google+.