If it's sweet or if it's white, don't eat it. Eat green stuff and red stuff and yellow stuff and some brown stuff. Make water your beverage of choice. Exercise regularly but begin gradually if you've not been doing it already. Depending on your specifics, weight loss may be needed. You're right to be concerned. 11 is quite high. If this leads you to a more healthy lifestyle, then maybe it is a blessing in disguise. It sounds like you already got the wake up call. Best wishes. Oh yea, if you smoke, quit now.