Well, my motivation lasted about a week. And then came the cravings.
Personally, what worked for me was changing things little by little. For example, when I started in January, I didn't stop what I was eating, I just stopped eating as much. I began to practice portion control. Then, once I felt I had handle on that, I began to drink more and more water.
Etc, etc. I'm now eating 1600 calories a day, finding myself making healthier choices, and I'm finally exercising 3-4 times a week. Slowly but surely.
It does get easier though. Just keep trucking along
Good luck!