Collecting Documents for approval

I am trying to get together any documents that I need for the approval process. The website for the surgeon's office said to collect documentation of other weight loss techniques you have tried. I printed my recent payments for weight watchers to prove I was a member this year. I think I have all the weights in my little weight watchers booklets that go back up to 5 years ago. I have quit and re-joined a few times, but this will prove that I tried it and also that I have been obses for at least that 5 years. I also am a member of the YMCA now and I printed all my p[ayments to them over the years to prove that I have tried the gym too.

Do you have any other suggestions of documents or things I should get together that would help me in the approval process? I want to try to get together as much as I can upfront to speed things along. Thanks.