Getting out of a cycle

Yesterday was a day that a light bulb moment has finally hit me.  I have no excuse to not exercise. My desire is to change.  I would like to stop doing things the way they are.  I have the answers but how do I go about applying those answers to my situation?  I have been thrown off course, yes, but I wonder if that is an excuse now.  I am great at procrastination and making excuses, but why am I not great at affirming myself?  There isn't much else to write today but I now have a plan and that plan is to allow myself to be overwhelmed to the point where I stay stuck.