Personally, I wouldn't consider donating more money to the slimming industry. We all know that fad diets and 'slimming systems' just don't work. It's madness to deprive yourself and spend all day thinking about food. If you want a biscuit, have a bloody biscuit.
It's easy enough to live healthily without getting too anal about it. If you eat plenty of fruit and veg, and run regularly, you'll lose weight. If you do need to kick-start a weight-loss regime then I reckon the calorie approach is best.
There are plenty of websites about that will tell you how many daily calories you need to maintain your weight, and how many to lose x amount per week or month. Once you know this, you just make sure that your daily net calories (food intake minus exercise calories) is roughly around this figure, and over a period of time the weight will drop off.
If you occasionally want to go out for a curry or (shriek) eat a biscuit, then do it. If you eat a curry or a load of hob-nobs every evening, you'll probably struggle. If it's once every week or two it won't matter.
Treat your diet intelligently rather than obsessively.