What was your moment?

When/ What happened that made you look at yourself and say I need a change? I am just wondering what made others decide to make changes for the better in there lives.
Here is my story:
On the early morning of March 19th I received a horrible phone call from a very close friend of mine at 4am. It was one of the hardest phone calls I have had to ever receive one of my best friends was gone. We had been best friends for 20 years (I am only 31 he was 35 at time of death) he was my brother my back bone and everything in between. We found out he had been diagnosed with sleep apnea the Monday before his passing so he was not on a machine it hadn't came in yet. He had gained a lot of weight in about 6 months 75lbs +/- we were told people with sleep apnea gain a lot of weight due to it. None of us had any clue he had been having health issues he never shared them with any of us. The night of his death he had been drinking celebrating St. Patties day and his vacation from work. A few friends helped him to bed that night and that was it. At 3am when they went to check on him he was gone there wasn't anything anyone could have done to bring him back. We have been told because he had sleep apnea he just stopped breathing and his body couldn't start back up again. So 6 days later I had to bury him in the ground and give my final good byes it was absolutely horrible for me.
One month later I went to the doctor because I had gained 25lbs in two months after changing nothing in my life habits no extra foods no extra laziness nothing. My doctor decided to do a whole run through on me see if there was something there to explain it nothing everything was normal. She than told me the thinks its sleep apnea and I need to go for a study. That was it that was the last day I was going to live unhealthy. I was and will not watch my family/friends/Children/Loved ones go through what I had just watched close friends go through. The next day I went to the gym and I starting running again. I started tracking absolutely everything that I eat I am not perfect but its better than nothing. One month later I am down 20lbs and refuse to look back. I still have to go in but I do know sleep apnea can improve and diminish the healthier you are. I plan on being under 200lbs by the end of the year or close to it hopefully but only time will tell.

So what made you want to change? What made you say enough is enough?