What makes a good ending? Three words: surprising, inevitable and right.
The first two categories are linked – and come down to what events you choose and how you seed them.
For me, thinking of events isn’t the biggest problem. I can think of many ways to tie up a tale. What I want is the one that will be right. Read more...
http://nailyournovel.wordpress.com/2011/03/06/how-i-know-when-i%E2%80%99ve-got-the-right-ending-for-my-novel/