What sort of diet are you trying? I'm just curious.
I've known several people to try Atkins, and get sick of it right quick.
Dieting is such a pain in general. It's probably easier when you're accountable to someone else for it.
The "Sean Lost 50lbs Twice This Way" diet.

Low carb (so that you can still have cookies or pizza now and again) high veg, moderate protein. Gym time 3x week & other exercise 4x a week. 2000 cal/day goal.
Keeping the weight off can be hard, especially around Xmas but it will make getting in shape easier. She has protein most every day in the form of 2 eggs. It's a very fluid diet designed to be sustainable, flavorful, and adaptable. Like tonight were having a good low fat meal of chicken, barley, & veg but I'm adding cookies to it because she has had a damned hard week.