Three: Do not choose unwilling participants.
Four: Do not site everyone in shadow.
Five: Do not choose a time where children are tired and/or hungry.
Six: Do not try to be funny in order to make children smile.
Seven: Do not expect a perfect family shot.
Eight: Do not rely on technology.
Nine: Do not let the dog off.
Ten: Don't focus on what went wrong, the difficulties of getting everyone together and facing the camera, or the [tiny] imperfections. Rather enjoy the memory of a family together, loving each other and having fun together!