Writing every day is really important especially when you’re in the process of writing a short story, novel on any other kind of ongoing project. I find that when I am working on a project and stop writing when I return to the project I am lost because the “flow” is gone. For that moment momentum is lost and I am back to square one.
Even if you write an hour, heck even half an hour it will help keep that story moving forward. Try to make time for your writing and before you know it you’ll be finished with your story and believe me when I say this. It’s an awesome feeling.