A pre-planned photo shoot is the best option, but when it comes to the fam, it's usually an on-the-spot decision because everyone happens to be dressed and at the same place at the same time.
So last week I did a quick five minutes (already too long for the attention span of toddler and a newborn), shoot for my brother and his family. It was mostly spent chasing the two-year-old around the back yard, so of course there's a photo of that too.