How to get back in the healthy lifestyle track?

After 3 years of losing 80 pounds, and quitting smoking I moved across the country away from my daughter and took a job that was horrible. I let that and my moms lung cancer areas me out so i started eating, drinking and smoking again.

Fast forward and I now have a great job but so insecure about my bad habits that outside of work, in a new town I never leave the house.

How do I get back to the 10k running, smoke free healthy lifestyle and finally ditch the booze?
How to get back in the healthy lifestyle track?
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