One thing I noticed when making notes on my father's life is that beside the stories he told and some documentation he left, there are gaps in his life where I have no idea where he was living or what he was doing. For instance, he left his home in Balloch when he was twenty years old to live in England. That would have been 1942. I have a record of him living in Blackheath in 1948 but the years in between are a mystery. I have a vague recollection of his saying that he lived in Chester or Worcester before moving to London but that's the only information I can find.
If you're like me and want to hand your family history down to your children, remember to keep a record of your own life too.