I'm actually a little nervous that I'm going to hit the end of the story well before the 70,000 word mark. My first inclination when I realized that was to go back and do a new outline, and try to figure out where I need to add.
Instead of looking back, I decided the best thing to do would be to press on, and see where the word count is when I hit ‘The End’. If I stop to reassess, I might get so sidetracked that I don’t finish the thing. Besides, the word count will change as I go through and edit it anyway. I want to focus on finishing the story. If I'm short, I can figure out where I need to add, and if I'm long, which I won’t be, I can figure out where to cut.
At this point in my writing journey, I believe its vital that I simply finish that which I have begun.