You don't always have to go so far as to murder your darlings—those turns of phrase or images of which you felt extra proud when they appeared on the page – but go back and look at them with a very beady eye. Almost always it turns out that they'd be better dead. (Not every little twinge of satisfaction is suspect—it's the ones which amount to a sort of smug glee you must watch out for.)
I have always wondered about this. It would make me so sad when they would kill my favorite characters! PC Cast is one prime example! I love House of Night but everyone kept dying. Same with Harry Potter. No one has no idea how upset I was with Sirius and Remus dying in the books! I was all noooo! Let Pettigrew die not them. I was upset. I began to see a pattern in the books I was reading. What went through my mind was why do authors have to kill the main characters, can't they simply have them just leave the book peacefully? I really can't kill people in my novels because then I begin to cry while writing it, and rereading it over and over again. It really depends on the writer, but I would not kill a character unless it was a full fledged battle scene.