Write: Just do it!
Sometimes, you just have to do it. Sit down. Don't be distracted by alluring alternatives. Write. And write. And write. And write. When you reach a snag, don't get up and find a snack to eat. Ask your husband what he would do if he were trying to do what is happening to your character. Put yourself there and ask what would be the logical thing to happen. Write it down. Look up others' experiences with that situation. Write some more. It is so easy to find something else to do while you supposedly think about your book, but that can be done at other times in the day. This is the short window of time in your busy schedule you've dedicated to write. So do it. Write. Get that story on paper (electronically speaking). The key to eliminating distraction is to be disciplined enough to focus. Keep writing. Just do it!