What I did was to watch Biggest Loser USA programme which made me see just what I was not going to become plus the determination they have is amazing so if they can do it then so can I!!
I also drink loads of water, between 4-5 litres a day inclusive of water for tea but excluding shake water.
I had photos of me taken in 4 different dresses from the front, back & side & took my measurements to enforce the shock factornof just how big I'd become. The image of me i those photos isnengraved on my mind and I will not stay like that or indeed return to it once I'm slim again. I am also going to get the very same pictures done again next week (4 week progress) in e same outfits, same pose and same place and I'm also going to be measured again to enable me to calculate my weight loss in inches as well as well as in pounds.
Finally, this forum needs to be your bestest friend because the support & inspirational stories you'll get on here will help you through your first week. Week 2 gets easier.
Good luck.