What is the Blogging from A to Z challenge and where can I find more participants? Right here.

Character arcs can be vital to making your story end in a satisfying manner. Yes, it's important that the antagonist or main point of conflict is overcome, but how did it change your protagonist?
I once wrote a novel where the poor main character suffers terribly, yet manages to defeat the antagonists by the end of the story. It should all be good, right? Sadly, no. I found the story elicited a resounding 'meh' from those that read it. The problem: The character never changed. He was the same guy at the beginning, beset by trying circumstances, who then has to make connections with several shady folks, suffers some injury and emotional trauma, but then comes out on top, generally the same guy. He didn't grow.
So it was back to the drawing board...or keyboard as it were. Time to dig deeper into the character, to make him more active in his journey, not just physically, but emotionally, so that at the end, he had changed, for better or worse.
As you read over the story you're editing, give some thought not only to the plot arc, but also the characters. Are they changed? Do they grow? Did they learn something important about themselves? Are they adequately challenged to create a solid conflict and satisfying resolution?
What's your favorite way to put characters through the wringer to elicit change?
I'd love to visit your blog and see what you're up to with the A to Z Challenge. Please be sure to leave a link with your comment.