Most people don't really think about the number of things that make them smile.
Not just the big things, but the little things in life. You don't necessarily need major events to make you smile. It's just those little moments that can genuinely make your day just because they make you smile.
Things like spending time with people you love, even if you're not really doing anything. Doing silly things to make yourself (and other people!) laugh. Getting excited about things, counting down to things, laughing about things. Things you can remember in the years to come, and wonder why you found them so funny.
Those are the things that really make you you. :)