I always have a basic plot outline, but I like to leave some things to be decided while I write.
J. K. RowlingDid you see me disarm Hermione, Harry?" "Only once" said Hermione stung. "I got you loads more then you got meโ" "I did not only get you once, I got you at least three timesโ" "Well if you're counting the one where you tripped over your own feet and knocked the wand out of my handโ
J. K. RowlingOr yet in wise old Ravenclaw, if you've a ready mind, Where those of wit and learning, Will always find their kind.
J. K. Rowling