I've just returned from two trips that were separated by a three day weekend at home. Both were for family reunions. (See previous posts)
Family is great stuff for a writer. You know them intimately; you know their weaknesses and their strengths. You can use them for characters in your stories (changed enough, of course, so they don't know they are being mocked in your masterpiece).
Another great use for family and writing is everyone's anxieties. Just listen long enough and you will find the makings of a great conspiracy theory. Between all the different philosophies in my families, I found at least 7 different conspiracy theories.
I guess it takes looking hard to find the opportunities in fiction, but when found they can be more precious than jewels.