Getting motivated for change

It's December 2013, the end of the year, but I am not going to wait for New Year's Day to change. I've been motivated to a small degree, and have made some minor adjustments to my life. I'm a volunteer at a local pregnancy center, but don't go there too often.I have had a few short-lived jobs I lost because I wasn't used to working since I am disabled,but have started writing a biographical account of my marriage because I think it can be a source of inspiration for others. I was working out faithfully but stopped when I lost the insurance plan that covered my membership at Curves, but signed up for another insurance plan so I can go back. i've gained some weight back, but not all of it.
I guess I have been taking some steps forward, but falling several steps back. I could blame my disability, but I don't want to do that. I want to hold myself responsible because responsibility is empowering. I have to believe the ability to change is mine. If I have a fault, I need to be convinced I can change it. If I have a bad habit, I can make better habits.
My motivation for change is based on the belief I can indeed be a better me, that I'm not a lost cause.