I just knew this is something I wanted for myself and I was sick of being overweight; I was miserable, I felt unattractive to my husband, it was beginning to affect my health and energy negatively; I had had enough.
Sure, there were slip ups in the beginning. We all have them but I treated them as a learning experience and made changes to rectify the problems that led to them. For example: I'm a choco-addict. So instead of depriving myself of this food and treating it like a forbidden fruit I found guilt-free chocolate substitutes and ways to sneak in dark or semi-sweet chocolate into my foods. I learned to savour it rather than inhale it and how to fit in small amounts into my diet so when I do get around it, I'm not salivating and desperate to get my hands on it.
Diet and exercise shouldn't be torture. They should be changes you can maintain for the rest of your life. Of course, the adjustment period is still hard but after a couple months it will became second nature for you. It gets easier and it just becomes the "new you".