Am I looking for a magic pill?

I'm feeling very strong and disciplined today.  That's become the norm for me at the beginning of the week.  I start off with great intentions to eat right, stay on my spending plan, take care of myself, etc...  But as I move toward the weekend, I find myself slipping into every bad habit that I've ever known.  What is my trigger to keep that focus and determination?  I "know" all the right things to do.  Why don't I do them?  Is it simply a matter of habit?  I have set goals for myself for this month of August.  I can achieve them and I know HOW to do it.  One day at a time.  That's all I can control.   There's too much of life that I truly have no control over.  But there is alot that I can control.  I really do have a desire to be an example to others around me.  The only way I will do that is to live according to my desires and plans on a daily basis.  I have a strong desire to be a woman of discipline.  I love that phrase.  It represents strength and someone to be counted on and admired.  I don't want to be admired for my sake but for the ONE I represent.  I want to be a true reflection of God who loves me and is in my heart.