Take it slow. Try changing one thing at a time, like eating a healthy breakfast. I don't fast or eat organic, but I drink the Master-Cleanse lemonade daily and am trying colonix next. I may never complete a Master cleanse fast, but the lemonade alone has cleared up a lot of digestive issues for me. It is amazing what lots of water can do for your body.
I think sometimes making too many drastic changes at once leads to failure and further feelings of hopelesness.