JESS ~ the best motivation for you is to just feel good and be healthy -- but more than that, making a commitment to yourself will take you a whole lot further. Motivation gets you started, but commitment will carry you through all kinds of stresses ...
Time to make a few small changes: Junkies out of the house; replace with good healthy foods and snacks. Can't eat the junk if it's not there, right? Pick or create a plan that will fit into your family life; and that you can stick to. Don't be overly strict; and forgive yourself when you make mistakes. Mistakes are just life lessons, learn from them and continue on.
You will find lots of support, and info, and ideas here; take advantage of this great free support tool -- and enjoy yourself too!