Hi,
Ok, I lost 6 stone 3 years ago and so far have only managed to put a stone back on. But here are some things that I did to help.....
1.Plan your whole weeks meals (this saves time and money) but make sure you only have meals you like as you tend to go off track if you say put a salad or something and then dont fancy it.
2. Put reminders, for example post it notes on cupboards or mirrors anywhere you will see that will keep you motivated and remind you why you are doing it.
3. Display all the zero heros and hide or dont buy the bad stuff.
4. Have a treat at the end of the day to look forward to.
5. Have a non food treat for reaching your mini goals
6. make mini goals, really mini goals that you can achieve in a day or few days, then have bigger goals for the week or month.
7. Have a cheat meal once a week at the weekend
8. Exercise in little spurts. break it down into 10min sections.
9. Get a special date in mind for motivation, if you dont have one make one.
10. Cook a new meal once a week.
11. Have a low point snack box that you have already factored in for the day.
There are lots of others, like freezing grapes (the food kind

) etc that I have heard of as well.
Once you are on it...YOUR ON IT you just need to find a way to get motivated and you will be well on your way.
I have stopped and started lots of times but it just takes one time to click and you get it.
GOOD LUCK!!
(sorry for spelling im in a rush)