Anyway, I joined this challenge and now on my 19th day. The rule says post a photo of something that made you happy on that day. You should do this for 100 days. It can be a thing, place, event or anything that made you happy. In my case, it's always food. Hahaha.
As the rule said, don't do this to brag or show off. Do this because of other reasons that are more meaningful and sensible. I am barely on the 1/5 of this challenge yet I've already realized something -- it's not hard to be happy. Simple things make me happy that it becomes confusing which one to post out of a number of things that made me happy. The other day I got a solution; my friend told me her friend posts several photos in a day and tagged them differently (eg #day1.2, #day1.3, etc.) She is such a genius! I'll do that moving forward. :)
It became a trend on social media (most especially on Instagram) that almost everyone I am connected with already jumped on the bandwagon.
It's fun, at the same time it can teach you appreciate all those little things in your life. Try it... and be happy. :)