22 years of sobriety in a row! How?

I got sober when I was 16 years old. I know it seems awfully young but it was precipitated by stays in 2 psychiatric hospitals, a suicide attempt/drug overdose, a 3-day coma, a halfway house and a 5 month long stay in a rehab. I did a lot of damage in a few short years. I believe the one of the biggest reasons I got sober and stayed sober is because I completely changed my identity and circumstances. I stopped hanging around with my old friends and found new ones in NA-AA. I also took a job as a maintenance man in a rehab my town. I went to a meeting everyday without fail. I joined a group that I liked and went on commitment meeting to speak at other groups. I tried to replace all my old habits with new positive ones. No it was not easy. Life still continues to be challenging at times but for the first time in my life I believe I am in a position to be able to help others. Living a productive and positive life is not as difficult as was because I did the hard work in the beginning and didn't quit when times got tough.