First of all, I have a giant notebook. Inside, I write lots of lists. Some titles you'll find in my notebook: funny things kids do; annoying things kids do; what kids fight about; excuses they give; sweet things kids do. Don't just email your girlfriend or tell Mom or Hubby about the craziness you endured during the day--write it down, even just in shorthand.
Also, after a workshop by Sarah Shapiro, I've learned to listen and practice writing dialogue. She says to do it daily, but I'm not that good about it. Just copy down a short conversation every week or so, and you'll get practice.
Read LOTS...then respond in a book club, blog, or by writing a review online. If the book gave you an idea, extend it as far as you can.
No T.V. means more time and more productive time is available in this house.
After you write, revise. Test out on friends by sending your story to them or by joining a writing group. Then revise more according to what they suggest, then re-read to them. Is it improved?
Figure out who publishes similar pieces to yours, get the submission guidelines, then send the manuscript in! You'll never know if you might have succeeded if you never try.
And remember, rejection letters are good for your middos.