In my "off" time, I do some amateur photography for friends.
The most important thing I've learned is:
The most memorable moments are the ones that aren't planned. I caught this simple kiss from Mom to Daughter in the middle of a conversation, this is why I never take the camera away from my eye. It is so true and so genuine in both their eyes. You can't stage this.
You don't have to plan a big event for it to be memorable, what matters is that you're truly there.