It is really personal choice, but my preference is to go for a tree that starts at the top with one chap and branches out as it goes down, rather than starting with one person (you) at the bottom and branching out as it goes up!!
Finding out about grandparents siblings, I agree with g a r , can produce leads to going back further, and also makes the family 'story' so much more interesting. I like to find out all I can about each person in my tree, rather than just use them as a step to the next generation back. So that means finding out about their parents, children, siblings, birth, christening, marriage, death, burial, Will, their work, addresses they lived at at various times, what they did in the war (if relevant) and anything else that comes up!
Will that keep you occupied for a while?
