What are your reasons to smile? Can you make your own list up? Trust me it's such a positive thing to do, and the longer you write, the more reasons will come to you.
Reasons can be big or small, mean a lot or a little to you, but if it makes you smile then it's all good!
Just think of the positive momentum you will have going on when writing them out. The smiles on your face, and the positive vibes you will emit. Those positive vibes are worth their weight in gold. 
So get thinking and get smiling and why not give it a go yourself?
Here's the link to 150 personal reasons for me to smile. Use them as ideas, or as journal prompts. or just read them and smile. 
Happy days
Much love for now 
Eve xx