My success story...needs help to be written! lol

Since January I have mused on what to put into my success story that I need to write. They do not exactly cover writing success stories in English Composition 101 so I am not sure how to organize it, what content to put in and so on.
I definitely would want my story to motivate others. I am not sure if I should put in details as to how I lost weight (details about my diet and exercises I use) or maybe if I do add this to make sure to add that the readers use things they are interested in and can stick to.
I will write it anonymously and would like to post it here, for advice and input so I can tweak it.
So I would love advice first: what would you expect or want to read in a weight loss success story?
Thanks for any advice!