Ahead by a Century

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I am ahead by a century (100lbs over the weight that my doctor tells me I should be). I'm 39 and in great health otherwise. I don't want to be an overweight 40 year old, so I am committing to being fit for 40.

In July of next year, I want to weigh 187 Lbs. This is the weight that my doctor says I should weigh.

I am a father of 2 babies, a business owner and play in a band.

Who has some support or advice for how to really succeed? Has anyone done this? What's your story?