<human>: Can you condense the text into a few key points?

Dear Askreddit, 

For the past month or two I have been drinking alcohol everyday. Before that it was still probably most days of the week.  I have smoked marijuana everyday for nearly 6 years now, and recently have increased my intake to 6+x a day. 

My diet over the past couple of months has basically consisted of fast food, and pizza. Literally eating pizza or fried chicken almost everyday. I have realized I am severely neglecting my health. 

I have decided to give up alcohol/drugs and fried food/unhealthy pizza/fast food. I am ready to start and I was wondering where to start.

Should I fast for a few days first, and just drink a bunch of water? Should I load up on certain vitamins or minerals? I am considering buying some sort of detox/cleansing product from a health food store? Does anyone know anything about these products?

Would really love any advice on starting my journey to health again and specifically the detoxification process. Thanks.
<bot>: Attempting to quit extremely unhealthy lifestyle, need advice on beginning detox process, re: nutrition, effectiveness of detox products, methods of withdrawal, etc.