It is calld "3 good" and is writing 3 good things which happened to me today.
When ( or "Even if"?) we feel sad or do failure, writing them make us positive to some extent. It gives us a chance to recover from bad situations.
I believe the power of words.
If we utter(Does "utter" hat negative meaning?) positive words, something good will happen!
If we twitter negative words, we will get some troubles.
I will carry on it every day before I go to bed !