Misdee, I'm a veteran of calorie-controlled diets. I lost 4 stones in 2001 and went from a very large girl to an average sized one!
I put on about 3 stones when I had my baby last year and am in the process of getting it off again. I've lost a stone since new year 
For me, the best thing is lack of variation. If I take the choice away, I don't have to think about what to eat.
Most days, I eat 40g Allbran for breakfast, soup and a yoghurt for lunch and an evening meal of about 400 calories. I snack on apples or strawberries, I rarely eat carbohydrates, and I take in about 1000 calories a day, plus a trip to the gym twice a week.
We have one treat a week, for example, a take away on saturday night. I expect to lose the other 2 stones by July/August. It's slow and steady and unlike slimfast or LL, it's a way of eating for life really (always knowing how many calories I'm taking in and pretty much following a GI diet once I'm at my target weight)
Good luck!!